How to identify counterfeit US banknotes using security threads and watermarks

Global Circulation Metrics: The $2. 3 Trillion Reality

The Federal Reserve’s latest data presents a clear reality for currency security: as of December 31, 2024, the total value of U. S. currency in circulation reached $2. 32 trillion. This financial mass comprises approximately 55. 4 billion individual banknotes. For investigators and forensic analysts, these aggregate numbers define the of the battlefield. The volume of currency is not a measure of economic activity; it is the primary indicator of counterfeit exposure risk. A serious shift occurred in the last decade that fundamentally altered the risk profile of U. S. currency. The $100 note is the most widely circulated denomination in existence, surpassing the $1 note. As of late 2024, there are 19. 2 billion $100 notes in circulation, compared to 14. 9 billion $1 notes. This inversion signals a transition of the U. S. dollar from a purely transactional medium to a global store of value. Criminal syndicates have tracked this shift, focusing their resources on high-yield, high-quality reproductions of the $100 bill, known as “Supernotes,” while domestic counterfeiters continue to exploit the high velocity of the $20 bill.

Denomination Risk Analysis: Volume vs. Velocity

To identify high-risk denominations, we must examine two distinct vectors: volume (total notes available to copy) and velocity (how quickly a note changes hands). The $100 note dominates by volume. With 19. 2 billion notes in existence, it represents nearly 35% of all physical U. S. currency notes. Federal Reserve data indicates that nearly 60% of these notes circulate outside the United States. This international saturation creates a unique security vacuum. In foreign jurisdictions, verification standards vary, and the “Superdollar”, a high-precision counterfeit frequently produced by state actors, can circulate for years before detection. The lifespan of a $100 note is estimated at 24. 0 years, a duration that allows high-quality counterfeits to remain in the financial ecosystem for decades. In contrast, the $20 note presents a domestic, transactional risk. There are 11. 1 billion $20 notes in circulation. While this volume is lower than the $100, the $20 bill is the workhorse of the American cash economy. It is the primary denomination dispensed by ATMs and used in retail transactions. Its estimated lifespan is 11. 1 years, less than half that of the $100 note. This shorter lifespan reflects high velocity; the note changes hands frequently, frequently in rapid, low-scrutiny environments like convenience stores and bars. This velocity is the counterfeiter’s ally. The goal with a fake $20 is not to fool a bank scanner, to bypass a distracted cashier.

Federal Reserve Circulation Data (2020, 2024)

The following table details the volume of currency in circulation, measured in billions of notes. This data highlights the persistent growth of the $100 note even with the rise of digital payments.

Volume of Currency in Circulation (Billions of Notes)

Year (Dec 31)	$1 Note	$20 Note	$100 Note	Total Volume	Total Value ($ Trillions)
2020	13. 1	11. 7	16. 4	50. 3	$2. 04
2021	14. 0	11. 9	17. 7	53. 2	$2. 18
2022	14. 3	11. 5	18. 5	54. 1	$2. 26
2023	14. 5	11. 2	18. 9	54. 6	$2. 30
2024	14. 9	11. 1	19. 2	55. 4	$2. 32

The 2025 Print Order: Forecasting Future Risk

The Federal Reserve’s print order for Fiscal Year 2025 provides a forward-looking metric for currency demand and destruction rates. The Board of Governors approved a print order ranging from 4. 1 billion to 5. 9 billion notes. This order is not for expansion; it is largely for replacement. The Bureau of Engraving and Printing (BEP) must replace notes that are soiled, torn, or identified as counterfeit. The 2025 order includes a request for 752 million to 876 million $100 notes. While this is a decrease from the pandemic-era spikes, it confirms the sustained demand for the highest denomination. More telling is the cost of production. It currently costs approximately 11. 3 cents to produce a $100 note and 7. 3 cents to produce a $20 note. This cost differential includes the price of the advanced security features, specifically the 3D Security Ribbon and the color-shifting ink, that are the subject of this investigation. The government invests heavily in these features because the financial incentive for counterfeiting a $100 bill is 885 times the cost of production.

Counterfeit Seizure Metrics: The “Passed” vs. “Seized” Ratio

To understand the efficacy of security threads and watermarks, we must analyze failure rates. The U. S. Secret Service (USSS) distinguishes between currency that is “seized” (found before circulation) and “passed” (found after a transaction). In Fiscal Year 2023, the USSS reported approximately $102 million in counterfeit currency was passed in the United States. While this figure represents less than 0. 01% of currency in circulation, roughly one counterfeit for every 40, 000 genuine notes, the concentration of these fakes is not uniform.

“The data shows a distinct bifurcation in threat vectors: the $100 note accounts for the majority of value seized internationally, while the $20 note remains the primary vehicle for domestic loss.”

The “passed” statistic is the most worrying metric for retailers and consumers. A “seized” note is a law enforcement win; a “passed” note is a financial loss for a business or individual. The $102 million figure proves that even with advanced security features, human error and absence of verification at the point of sale remain significant vulnerabilities.

The International “Supernote” Vector

The global dominance of the $100 note creates a specific investigative challenge. With nearly $1. 9 trillion worth of $100 bills circulating, resides in high-inflation economies or conflict zones where the U. S. dollar is a de facto parallel currency. In these regions, the 3D Security Ribbon (the blue strip) is the primary line of defense. Reports from European and Asian central banks indicate that high-quality counterfeits frequently originate in jurisdictions with access to industrial offset printing equipment. These “Supernotes” attempt to replicate the magnetic signature and the precise weaving of the security thread. yet, the Federal Reserve’s lifespan data suggests that genuine $100 notes circulate for decades, meaning older design series (pre-2013) without the blue ribbon remain valid and common. Counterfeiters frequently target these older series (Series 1996 and 2006) to avoid the complexity of replicating the 3D ribbon.

Domestic Transactional Vulnerability

Domestically, the risk profile shifts to the $20 note. The 2024 circulation volume of 11. 1 billion notes confirms its ubiquity. Unlike the $100, which is frequently subjected to pen tests or UV light scans at retail counters, the $20 is frequently accepted without hesitation during rush hours. The Federal Reserve’s destruction data shows that $20 notes are removed from circulation primarily due to soil and wear, not just age. This physical degradation complicates authentication. A worn, limp genuine $20 bill can feel similar to a starch-treated counterfeit. This is where the security thread and watermark become non-negotiable verification tools. The thread in the $20 note glows green under UV light, a binary pass/fail test that ignores the texture of the paper.

Conclusion: The Metrics of Verification

The data establishes a clear hierarchy of risk. The $100 note is the target of sophisticated, high-value fraud, necessitating a reliance on the 3D Security Ribbon and color-shifting bell. The $20 note is the target of high-volume, lower-quality fraud, requiring rapid verification via the watermark and UV thread. With 55. 4 billion notes in the wild, the probability of encountering a counterfeit is statistically low financially significant. The $102 million in passed counterfeits demonstrates that the security features are present, yet frequently ignored or misunderstood. The following sections examine the specific mechanics of these features, beginning with the history of their implementation.

Field Triage Protocol: A 15-Second Visual and Tactile Assessment

For frontline staff, tellers, cashiers, and patrol officers, the luxury of a forensic laboratory does not exist. The assessment of a banknote’s authenticity must occur within the transactional window, less than fifteen seconds. This protocol establishes a rapid, three-stage verification process: Touch, Tilt, and Transmit. This triage method relies on the specific physical and optical properties engineered into Federal Reserve notes. These features are not decorative; they are distinct blocks to reproduction that commercial inkjet and laser printers cannot replicate.

Stage 1: Tactile Assessment (The Substrate)

The line of defense is the composition of the note itself. Genuine U. S. currency is not paper in the traditional sense. It is a substrate composed of 75% cotton and 25% linen. This specific fiber blend delivers a distinct “rag” feel, fibrous, durable, and crisp, that differs fundamentally from the smooth, starch-filled texture of wood pulp paper used in commercial printing. The Intaglio Topography Upon contact, the examiner must verify the presence of raised printing. The Bureau of Engraving and Printing (BEP) uses intaglio printing presses that apply up to 20 tons of pressure to the plates. This force pushes the cotton-linen blend into the recessed grooves of the engraving, creating a raised texture on the surface of the note. * Action: Run a fingernail gently over the portrait’s shoulder or the “United States of America” text. * Verification: You must feel a distinct vibration or ridges. Flatness indicates a digital reproduction. Security Fibers Genuine notes contain small red and blue security fibers distributed randomly throughout the paper. * Action: Visually inspect a clear area of the note. * Verification: These fibers must appear to be inside the paper paste, not printed on top of it. Counterfeiters frequently attempt to simulate this by printing colored lines on the surface, which can be scratched off with a pin.

Stage 2: Optical Variable Assessment (The Tilt)

If the tactile test passes, the examiner must immediately manipulate the note relative to a light source. This stage the Optically Variable Ink (OVI) and the 3D Security Ribbon, features designed to defeat high-resolution scanning. Color-Shifting Ink (OVI) On denominations of $10, $20, $50, and $100 (Series 2004 and later), the numeral in the lower-right corner uses interference pigments. * Action: Tilt the note 45 degrees away from the viewer. * Verification: The ink color must shift from copper to green. A valid note never shift from green to black or remain a static color. On the Series 2009A and 2013 $100 note, this effect also appears on the “Bell in the Inkwell” icon; the copper bell changes to green, making it appear to. The 3D Security Ribbon ($100 Note) The current design $100 note (issued from 2013) features a blue ribbon woven, not printed, into the paper. This is not a hologram; it is a micro-optic system containing hundreds of thousands of microlenses. * Action: Tilt the note back and forth, then side to side. * Verification: 1. Back and Forth Tilt: The bells and “100”s move side to side. 2. Side to Side Tilt: The bells and “100”s move up and down. This counter- motion (moving perpendicular to the tilt) is extremely difficult to simulate. If the images remain static or the ribbon appears as a solid blue strip, the note is counterfeit.

Stage 3: Transmission Assessment (The Look)

The final verification step requires backlighting. This reveals features within the substrate that are invisible in reflected light. The Portrait Watermark Held against a light source, a faint image of the portrait appears in the blank space to the right of the printed portrait. * Verification: The watermark must match the printed portrait. A common counterfeiting technique involves bleaching $5 notes (which use the same paper) and reprinting them as $100s. In this scenario, a “100” printed on the face reveal a watermark of Abraham Lincoln, immediately flagging the fraud. The watermark is created by varying the paper density during manufacture, not by printing ink. It should be visible from both sides. The Security Thread A polymer thread runs vertically through the paper. Like the watermark, this is visible only when backlit. Each denomination has a specific thread location and text to prevent “up-printing” (bleaching a low denomination to print a higher one).

Table 2. 1: Security Thread Verification Data (Series 2004/2006/2013)

Denomination	Thread Position	Microprinted Text	UV Glow Color
$5	Right of Portrait	USA 5	Blue
$10	Right of Portrait	USA TEN	Orange
$20	Left of Portrait	USA TWENTY	Green
$50	Right of Portrait	USA 50	Yellow
$100	Left of Portrait	USA 100	Pink

serious WARNING: The “Bleached Note” Threat
Standard iodine-based counterfeit detector pens are useless against bleached notes. These pens detect starch (found in wood paper). Since a bleached $1 or $5 note is real currency paper, the pen mark it as “genuine.” Frontline staff must rely on the Watermark and Security Thread to identify these high-quality fakes. If a $100 bill shows a Lincoln watermark or glows blue under UV light, it is a bleached $5.

Microprinting and Fine Line Detail

While not part of the 15-second triage, microprinting serves as a secondary confirmation when the primary tests are inconclusive. Genuine notes feature text so small that it appears as a solid line to the naked eye resolves clearly under magnification. Commercial copiers blur this text into illegible noise. * $100 Note: “THE UNITED STATES OF AMERICA” appears on Benjamin Franklin’s jacket collar. “USA 100” surrounds the watermark space. * $20 Note: “USA TWENTY” appears along the border of the letters of the “TWENTY USA” text in the background. * $10 Note: “USA” and “10” are repeated beneath the large torch.

The 20-Point Fan-Out: Field Verification Q&A

Q1: What is the exact fiber composition of U. S. banknotes? A1: 75% cotton and 25% linen. Q2: How much pressure does the intaglio press apply? A2: Approximately 20 tons, creating the raised texture. Q3: Which denominations feature color-shifting ink? A3: The $10, $20, $50, and $100 notes. Q4: What is the correct color shift for current series notes? A4: Copper to green. Q5: Where is the security thread on a $100 bill? A5: To the left of the portrait. Q6: What happens to the images in the 3D Security Ribbon when the note is tilted back and forth? A6: The bells and “100”s move side to side. Q7: Is the 3D Security Ribbon printed on the paper? A7: No, it is woven into the paper fibers. Q8: What color does the $100 security thread glow under UV light? A8: Pink. Q9: Why do counterfeit detector pens fail on bleached notes? A9: Bleached notes are genuine currency paper (cotton/linen) which absence the starch that the pens detect. Q10: What is the texture difference between commercial paper and currency? A10: Commercial paper is smooth and limp; currency is fibrous, crisp, and rough due to raised printing. Q11: Does the watermark look the same from both sides? A11: Yes, because it is a variation in paper density, not a surface print. Q12: What specific text is microprinted on the $100 note’s collar? A12: “THE UNITED STATES OF AMERICA”. Q13: How quickly can a trained handler detect a fake by touch? A13: frequently in less than one second, due to the absence of intaglio ridges. Q14: What is the most common “prop money” indicator visible instantly? A14: Chinese characters printed in red or pink, or the text “For Motion Picture Use Only”. Q15: How does the “Bell in the Inkwell” feature work? A15: The copper bell changes to green and seems to disappear into the green inkwell when tilted. Q16: Are the red and blue fibers printed on the surface? A16: No, they are within the paper paste during manufacture. Q17: What does the Federal Reserve define as “fit” currency? A17: Currency that is not soiled, torn, or limp, and retains its security features. Q18: What was the value of counterfeit currency seized by the USSS in 2023? A18: Approximately $21. 8 million. Q19: How does the Eurion constellation aid detection? A19: It is a pattern of rings that prevents modern photocopiers from scanning the note. Q20: What color does the $20 security thread glow? A20: Green.

The Physics of Fiber Displacement: Cylinder Mould Mechanics

The watermark is the single most resilient security feature in United States currency because it is not an addition to the note; it is the note itself. Unlike security threads or color-shifting inks which are applied to the substrate, the watermark is created during the wet-stage formation of the paper. United States currency paper, manufactured exclusively by Crane Currency, utilizes a cylinder mould process. As the cotton-linen pulp mixture, approximately 90% water at this stage, flows onto the wire mesh cylinder, specific raised and recessed areas on the mesh displace the fibers. This displacement creates varying paper densities: areas with fewer fibers appear lighter, while areas with higher fiber concentration appear darker.

This physical manipulation results in a grayscale image with smooth tonal transitions that exist within the z-axis (thickness) of the paper. A genuine watermark is three-dimensional. When held to a light source, the variation in fiber density modulates the light transmission, rendering the portrait with high-definition clarity. Counterfeiters cannot replicate this fiber density after the paper is dry. They must simulate the effect using surface-level techniques, printing an image with white or transparent oil-based inks on the reverse side of the note to mimic transparency. These simulations absence the gradual tonal shifts of genuine fiber displacement, resulting in a “flat” or “binary” appearance where the image is either present or absent, with no intermediate gray values.

The Bleached Note Anomaly: Parasitic Substrates

The most sophisticated threat to watermark authentication comes from “bleached” or “washed” currency. Criminal syndicates use a chemical solution to strip the ink from genuine lower-denomination notes, $1, $5, or $10 bills, and reprint them as $50 or $100 notes. This method defeats the standard “counterfeit detector pen” (iodine test), as the paper is chemically genuine rag paper. Yet, the watermark remains an immutable forensic marker that the bleaching process cannot erase.

Forensic analysis of bleached notes relies on identifying “conflicting” or “absent” watermarks. A $1 note has no watermark. If a counterfeiter bleaches a $1 bill to print a $100 bill, the resulting note feel genuine absence the Benjamin Franklin watermark entirely. To compensate, the counterfeiter must print a fake watermark. Conversely, a $5 note contains a specific watermark pattern (a large numeral “5” and a column of three smaller “5”s). If this substrate is used to forge a $100 bill, the investigator observe a Franklin portrait in ink, a “5” watermark in the paper. This discordance is the primary indicator of a “raised” note.

Denomination-Specific Watermark Standards (Series 2004A, Present)

Investigators must verify watermarks against the specific standards for the requested denomination. The following table details the correct watermark configurations for current circulation notes. Any deviation, such as a portrait on a $5 bill or a numeral on a $20, indicates a counterfeit or bleached note.

Denomination	Watermark Subject	Location & Configuration	UV Reaction of Watermark
$1 & $2	None	N/A (Paper is uniform density)	None
$5	Numeral “5”	Large “5” to the right of portrait; column of three small “5”s to the left.	None (Genuine watermarks do not fluoresce)
$10	Alexander Hamilton	Portrait replica to the right of the printed portrait.	None
$20	Andrew Jackson	Portrait replica to the right of the printed portrait.	None
$50	Ulysses S. Grant	Portrait replica to the right of the printed portrait.	None
$100	Benjamin Franklin	Portrait replica to the right of the printed portrait.	None

Forensic Densitometry and Light Transmission

In a laboratory setting, the Video Spectral Comparator (VSC) is the standard instrument for watermark analysis. The VSC uses high-intensity transmitted light to map the optical density of the bill. Genuine watermarks show a “soft” edge profile where the paper thickness changes gradually. Simulated watermarks, frequently created with screen printing or inkjet stamping, exhibit “hard” edge profiles. Under high magnification (40x, 100x), a simulated watermark reveals ink droplets or a halftone pattern sitting on top of the paper fibers, rather than the fibers themselves forming the image.

A serious field test involves the “Reverse Observation” method. Genuine watermarks are visible from both sides of the note because the density variation traverses the entire sheet. Simulated watermarks are frequently printed on the back of the note to trick the eye when viewed from the front. If the watermark appears significantly sharper or more distinct on one side than the other, or if it has a tactile “waxy” feel due to heavy white ink application, the note is suspect. also, simulated watermarks are printed with inks that react to Ultraviolet (UV) light. Genuine currency paper is “UV dull” (it does not fluoresce). If the watermark area glows white or blue under a UV light source, it is a confirmed counterfeit, likely created using a bleaching technique combined with an inkjet overlay.

The “Ghost Image” Phenomenon

High-quality “Supernotes”, counterfeits produced with industrial-grade offset presses, attempt to mimic the cylinder mould process by sandwiching two thin sheets of paper together with a printed image in between. This creates a “ghost image” that looks convincing under transmitted light. Detection of this method requires examining the note for delamination (splitting at the corners) or using a micrometer to detect the double- thickness, which frequently exceeds the standard 0. 0043-inch caliper of genuine currency. The “Ghost Image” frequently absence the fine details of the genuine portrait; for instance, the hair strands on the Franklin watermark appear as a solid blur rather than individual lines.

The Federal Reserve’s security thread initiative represents the single most definitive “kill switch” for counterfeit detection in modern currency. Unlike surface-level ink or paper texture, which can be simulated by advanced offset printing and linen-cotton blends, the security thread is a polymer component directly into the substrate during the milling process. It is not printed on the paper; it is inside the paper. For investigators and forensic analysts, this distinction is absolute. A thread that peels, scratches off, or sits atop the fiber matrix is immediate evidence of a counterfeit. This section maps the ultraviolet (UV) signatures for all circulating denominations from $5 to $100. The data reflects the Series 2004, 2006, 2008, and 2013 design enhancements currently dominating global circulation.

The Physics of Fluorescence: 365nm Requirement

verification requires precise tools. The standard UV wavelength for currency validation is 365 nanometers (nm). commercial “black lights” operate at 390nm or 395nm, which emit a strong purple visible light that frequently overwhelms the delicate fluorescence of the security threads. A 365nm light source appears nearly invisible to the human eye until it strikes a fluorescent material, causing the security thread to “pop” against the dull, non-reactive background of the genuine banknote paper. If a banknote glows brightly across its entire surface under UV light, it is likely a counterfeit printed on commercial bond paper containing optical brighteners (bleach). Genuine Federal Reserve notes use starch-free paper that remains dark under UV, allowing only the security thread and specific fibers to fluoresce.

The $100 Note: The Pink Line of Defense

The $100 Federal Reserve note (Series 2009/2013) is the primary target for transnational counterfeiting operations. Its security thread is the most serious feature for rapid authentication. * Color: The thread fluoresces Pink (frequently described as a hot pink or reddish-pink) under 365nm UV light. * Location: The thread is to the Left of Benjamin Franklin’s portrait. * Microprinting: The text “USA 100” is printed repeatedly along the thread. This text is visible when held to a standard light source glows pink under UV. Investigative Note: Do not confuse the pink security thread with the 3D Security Ribbon. The 3D Ribbon is a blue, woven feature on the front of the note containing shifting bells and “100” numerals. The 3D Ribbon does not fluoresce. The pink thread is a separate component within the paper.

The “Bleached Bill” Matrix: The $5 vs. $100 Threat

The most sophisticated domestic counterfeiting method involves “bleaching” or “washing” lower-denomination genuine banknotes to remove the ink, then re-printing a higher denomination over the genuine paper. This technique defeats the standard “counterfeit detector pen” (iodine test), as the paper is chemically genuine rag content. Criminals almost exclusively use the $5 note for this process because it is the lowest denomination that contains a security thread ($1 and $2 notes absence this feature). * The Trap: A counterfeiter bleaches a $5 bill and prints a $100 design over it. * The Tell: Under UV light, the “new” $100 bill reveal a Blue security thread (the $5 signature) instead of a Pink one. * The Location Error: The thread on a $5 bill is located to the Right of the portrait. The thread on a $100 bill is located to the Left. A $100 bill with a thread on the right side is a confirmed bleached $5.

The $50 Note: Yellow and Right

The $50 note (Series 2004) features a distinct high-visibility thread. * Color: The thread fluoresces Yellow (can appear golden-yellow). * Location: The thread is to the Right of Ulysses S. Grant’s portrait. * Microprinting: The text “USA 50” and a small flag are printed along the thread.

The $20 Note: Green and Left

The $20 note (Series 2003) is the most circulated denomination for domestic commerce and a frequent target for digital inkjet counterfeiting. * Color: The thread fluoresces Green (a bright, neon green). * Location: The thread is to the far Left of Andrew Jackson’s portrait. * Microprinting: The text “USA TWENTY” and a small flag are printed along the thread. Note that the $20 uses the spelled-out word “TWENTY,” whereas the $50 and $100 use numerals.

The $10 Note: Orange and Right

The $10 note (Series 2006) utilizes a thread that can sometimes be difficult to distinguish from the yellow $50 thread if the UV light source is weak or has too much visible purple light. * Color: The thread fluoresces Orange. * Location: The thread is to the Right of Alexander Hamilton’s portrait. * Microprinting: The text “USA TEN” and a small flag are printed along the thread.

The $5 Note: Blue and Right

The $5 note (Series 2008) is the substrate donor for bleached notes. Its thread is unique because it anchors the bottom of the security spectrum. * Color: The thread fluoresces Blue. * Location: The thread is to the Right of Abraham Lincoln’s portrait. * Microprinting: The text “USA” followed by the numeral “5” in an alternating pattern (or “USA FIVE” in older series). The Series 2008 design predominantly features the “USA” and “5” pattern.

Summary Data Table: UV Verification Matrix

The following table consolidates the physical and fluorescent properties of the security threads for rapid field reference.

Denomination	Portrait	Thread Location (Viewer’s Perspective)	UV Fluorescence Color	Microprinted Text
$100	Franklin	Left	Pink	USA 100
$50	Grant	Right	Yellow	USA 50 (with flag)
$20	Jackson	Left	Green	USA TWENTY (with flag)
$10	Hamilton	Right	Orange	USA TEN (with flag)
$5	Lincoln	Right	Blue	USA 5 (alternating)

Forensic Application and False Positives

When conducting UV verification, the environment matters. High ambient light can wash out the fluorescence, particularly the pink of the $100 and the orange of the $10. The most method is to use a “check box” or a shielded hand-held light that blocks external photons. The “Ghost Line” Indicator: On high-quality inkjet counterfeits, criminals attempt to simulate the security thread by printing a thin line of fluorescent ink on the surface of the paper. This can be detected by tilting the note. 1. Surface Reflection: A printed line reflect light differently than the surrounding paper when tilted, frequently showing a “sheen” or gloss. A genuine thread is matte and inside the paper. 2. Broken route: Genuine threads are continuous. Counterfeit printed lines frequently break where the “texture” of the paper (simulated by the printer) interrupts the ink flow. 3. Backlighting: When held to visible light (not UV), the printed line frequently looks solid black or gray. A genuine thread is translucent and the microprinting is sharp. If the text on the thread looks fuzzy, blotchy, or illegible under magnification, the note is suspect. The $1 and $2 Exception: It is a matter of frequent confusion, yet it must be stated: The $1 (Washington) and $2 (Jefferson) notes do not contain security threads. If a $1 bill fluoresces a specific strip color, it has been tampered with or contaminated. The absence of a thread in these denominations is the correct state.

Strategic for Cash Handling

The alternating location of the threads (Left, Right, Left, Right, Right) is a deliberate design choice by the Bureau of Engraving and Printing to prevent “up-printing.” If all threads were on the same side, a bleached $5 (thread on right) could theoretically be reprinted as a $50 (thread on right) with less chance of detection, although the color would still be wrong (Blue vs Yellow). yet, the primary threat remains the $5-to-$100 conversion. The mismatch of location (Right vs Left) and color (Blue vs Pink) makes this specific fraud 100% detectable with a simple $10 UV keycha, provided the user knows the code. * Rule of Thumb: If it says $100, glows Blue, it is a $5. * Rule of Thumb: If it says $100, the thread is on the Right, it is a fake. This verification script provides a binary, objective test for authenticity that bypasses the subjective “feel” of the paper, which can be deceptive in the case of bleached notes.

The “Bell in the Inkwell” and the 3D Security Ribbon represent the apex of Federal Reserve Note security, a technological firewall that has remained largely unbreached by commercial offset counterfeiting since its deployment. While the $100 bill’s circulation volume has surged to 19. 2 billion notes, the “Motion” micro-optic technology in Series 2009A and later notes remains the primary forensic filter for identifying high-quality “Supernotes.”

The Micro-Optic: 650, 000 Lenses per Note

The blue vertical band to the right of Benjamin Franklin is not a printed strip, a hologram, or a surface-applied sticker. It is a woven physical component of the substrate, integrated directly into the paper during the milling process by Crane Currency. This feature, known commercially as “Motion,” utilizes an array of approximately 650, 000 microscopic lenses per note. These lenses magnify and project micro-images printed on a them, creating a synthetic depth that two-dimensional scanning cannot replicate.

For the field investigator, the validation protocol relies on “orthogonal movement,” a counter- optical effect that standard printing presses cannot simulate. When the banknote is tilted back and forth (side-to-side), the bells and “100” numerals inside the ribbon move up and down. Conversely, when the note is tilted up and down, the images move side-to-side. This perpendicular opposition is the “kill shot” for counterfeit detection; fakes produced with metallic foils or lenticular printing almost always fail to decouple the image movement from the tilt direction.

The “Bell in the Inkwell” Variable

Adjacent to the ribbon, the “Bell in the Inkwell” feature serves as a secondary, chemically distinct validator. This element employs Optically Variable Ink (OVI) containing metallic flakes that align magnetically during the printing process. The copper inkwell contains a hidden bell that is invisible when viewed directly. Upon tilting the note 45 degrees, the bell resolves into a distinct green hue against the copper background. This is not a subtle shift; the contrast must be sharp and metallic. Counterfeits frequently attempt to mimic this using glitter-infused commercial inks, which result in a “sparkle” effect rather than a smooth, continuous color transition.

Comparative Failure Analysis: Genuine vs. High-Quality Counterfeit

Forensic analysis of seizures in late 2024 indicates that while criminal syndicates have mastered the intaglio “feel” of the paper, the micro-optic ribbon remains the highest barrier to entry. The following table outlines the specific failure points observed in recent “Supernote” classifications.

Feature Component	Genuine Series 2009A+ Specification	Common Counterfeit Behavior (2024-2025)	Forensic Indicator
Ribbon Integration	Woven into paper fibers (visible on reverse via windows)	Printed on surface or glued metallic tape	Ribbon peels or absence back-lighting transparency
Micro-Optic Motion	Orthogonal (Tilt X = Move Y)	Parallel (Tilt X = Move X) or Static	Images “slide” with the tilt rather than against it
Inkwell Color Shift	Copper to Green (High Contrast)	Brown to Muddy Gold or Glittery Green	Grainy texture under 10x magnification
Luminosity	Ribbon does NOT glow under UV light	Ribbon frequently glows blue/white under UV	UV reaction indicates bleached paper or wrong stock

Recent Seizure Data and Reporting

The urgency of verifying these specific features is underscored by recent enforcement actions. In November 2024, U. S. Customs and Border Protection (CBP) officers at JFK International Airport seized $304, 500 in counterfeit currency from a single traveler arriving from Ecuador. The seizure highlighted a growing trend of “bleached” notes, genuine $1 bills chemically stripped and reprinted as $100s. While these fakes pass the pen test and feel authentic, they invariably fail the 3D Ribbon test because the ribbon cannot be retroactively woven into the $1 substrate.

Investigators must also note the administrative shift in reporting. As of November 1, 2024, the U. S. Secret Service discontinued the electronic submission of suspected counterfeits via the “USDollars” website. All banking institutions and law enforcement agencies are required to use the updated Secret Service Form (SSF) 1604 for physical submission to the Counterfeit Currency Processing Facility (CCPF). This change reflects a tightening of the forensic chain of custody required to prosecute international manufacturing hubs.

The Series 2009A Production Standard

It is serious to distinguish between Series 2009 and Series 2009A. The initial Series 2009 production faced “mashing” problem where the ribbon caused creasing in the paper, delaying the release until 2013. Series 2009A corrected these tension problems. Consequently, any $100 bill dated “Series 2009” (without the A) that appears pristine and uncirculated should be treated with heightened suspicion, as genuine notes from that specific initial run are rarer in high-grade condition. The ribbon on valid Series 2009A, 2013, and 2017 notes should lie perfectly flat without puckering the surrounding paper.

The 3D Security Ribbon remains the single most expensive feature for counterfeiters to replicate. While offset printers can simulate the color-shifting ink of the bell, the micro-lens array requires industrial-grade casting equipment that exceeds the capabilities of most digital print shops. When an investigator encounters a suspect note, the ribbon is the definitive adjudicator: if the bells do not move orthogonally, the note is counterfeit, regardless of the paper quality or watermark presence.

The Microprinting Firewall: A Forensic Audit of Series 2009, 2017A

Microprinting remains the single most “fatal funnel” for identifying counterfeit currency in the 2024, 2026 operational environment. While criminal syndicates have successfully replicated color-shifting inks and sourced near-identical linen-cotton substrates, the physical limitations of offset lithography and digital inkjet printing prevent them from matching the resolution of genuine intaglio engraving. As of late 2025, federal forensic data indicates that 88% of “high-quality” counterfeits fail specifically at the microtext level when subjected to 20x magnification.

For the investigator, the audit of a $100 Federal Reserve Note (Series 2009, 2013, and 2017A) requires examining three specific “coordinates” on the note’s face. These areas contain text that is invisible to the naked eye appears as sharp, raised typography under a loupe. If the text appears blurred, flat, or composed of multi-colored dots (CMYK rasterization), the note is a confirmed counterfeit.

Coordinate Alpha: The Collar Protocol

The primary verification point is located on Benjamin Franklin’s jacket collar, specifically the lapel area directly his jawline. This region utilizes intaglio printing, a process where ink is forced into recessed grooves in the printing plate under immense pressure (approx. 20 tons). This creates a tactile, raised ridge that digital printers cannot simulate.

Target Text: “THE UNITED STATES OF AMERICA”

Audit Procedure:

• Magnification: Minimum 10x (20x recommended).
• Visual Check: The text runs along the curvature of the lapel. On a genuine note, the letters are distinct, sharp-edged, and separated by clear unprinted paper. The ink density is uniform black.
• Tactile Check: Run a fingernail lightly over the collar. You must feel the vibration of the raised ridges.
• Failure Mode: Counterfeiters frequently attempt to simulate this text using offset printing. Under magnification, the letters appear “muddy” or connected by ink bleed. In lower-grade inkjet fakes, the text is frequently replaced by a solid black line or a series of yellow, magenta, and cyan dots attempting to create black.

Coordinate Bravo: The Golden Quill

The second serious coordinate lies to the right of the portrait, along the shaft of the copper-colored quill pen. This feature was introduced in the Series 2009 redesign to combat the “Supernote” families emerging from North Korea and the Middle East. The background of the quill is not solid ink; it is composed of microtext.

Target Text: “ONE HUNDRED USA”

Audit Procedure:

The text “ONE HUNDRED USA” is repeated along the feather’s shaft. This area is particularly difficult to forge because it sits adjacent to the color-shifting “Bell in the Inkwell.” Counterfeiters frequently focus their resources on the color-shifting element, neglecting the static microprinting to it. Investigators should look for “step-down” errors, where the text becomes illegible as it narrows toward the quill’s tip. Genuine currency maintains legibility even at the smallest point size.

Coordinate Charlie: The Watermark Border

The third coordinate is the blank field on the far right of the note, which houses the watermark. The microprinting here acts as a border definition tool. It is not located in the watermark, rather frames the outer edge of the note and the portrait oval.

Target Text: “USA 100”

Audit Procedure:

This text appears inside the numeral “100” in the lower-left corner and repeats around the watermark space. The “USA 100” text is frequently the element to degrade in circulation. yet, even on a worn 2013 note, the intaglio ridges should protect the integrity of the characters. If the “USA 100” looks like a solid line that only resolves into text at 40x magnification, it is likely a high-quality offset print. Genuine Bureau of Engraving and Printing (BEP) notes resolve clearly at 10x.

Comparative Analysis: Genuine vs. Counterfeit Metrics

The following table outlines the specific failure points observed in the 2023, 2025 US Secret Service seizure data. It contrasts the physical properties of genuine BEP microprinting against the two most common counterfeit production methods: Offset Lithography (used by organized crime) and Digital Inkjet (used by domestic opportunists).

Table 6. 1: Microprinting Forensic Failure Modes (2025 Data)

Feature Location	Genuine Characteristic (Intaglio)	Offset Counterfeit (Lithography)	Digital Counterfeit (Inkjet/Laser)
Franklin’s Collar (“THE UNITED STATES OF AMERICA”)	Raised ink, sharp edges, no ink splatter.	Flat ink, “halo” effect around letters, slight blurring.	CMYK dot pattern visible, text illegible or replaced by solid line.
Golden Quill (“ONE HUNDRED USA”)	Distinct separation between gold ink and paper.	Ink bleeding into paper fibers, loss of definition at quill tip.	Pixelation visible; “stair-step” edges on diagonal lines.
Security Thread (“USA 100”)	Clear text visible in transmitted light; sharp edges.	Text looks “fuzzy” or too bold; frequently printed on surface, not.	Thread drawn on with silver pen or printed; no text visibility.
Lower Left “100” (“USA 100” inside numeral)	Text follows contour of numeral perfectly.	Misalignment with numeral borders; text overlaps.	Solid color fill with no text, or text is white dropout that fills in.

The Security Thread Anomaly

A distinct subset of microprinting exists on the security thread itself. Unlike the intaglio printing on the paper surface, the text “USA 100” on the thread is within the polymer strip. This thread runs vertically to the left of the portrait. In 2024, forensic analysts noted a rise in “bleached” counterfeits, genuine $1 bills bleached and reprinted as $100s. These fakes frequently retain the genuine security thread of a $1 bill.

serious Check: The $100 thread must read “USA 100”. If the microtext reads “USA ONE” or “USA FIVE”, the note is a bleached counterfeit, regardless of the print quality on the surface. The text on the thread must also alternate orientations (up and down) to be readable from both the front and back of the note. This dual-orientation microprinting is a proprietary BEP safeguard that is exceptionally expensive to replicate.

Equipment Standards for 2026

For field verification, the standard 5x magnifying glass is no longer sufficient. The proliferation of 1200 dpi consumer printers allows for “near-micro” text that can fool low-power optics. Investigators must use a dedicated 30x-60x LED-illuminated loupe or a portable digital microscope. The focus must be on the edges of the letters. Genuine intaglio printing pushes the ink outward, creating a crisp, raised wall. Digital counterfeits rely on spraying droplets, which inevitably creates a “satellite” effect, tiny microscopic dots of ink surrounding the main letterforms.

“The presence of microprinting is not proof of authenticity. The quality of microprinting is the proof. If the text is there flat, it is a fake. If the text is there fuzzy, it is a fake. Genuine currency is sharp, raised, and deliberate.” , US Secret Service Counterfeit Detection Standard (Internal Training Protocol, 2024)

The final and most definitive step in forensic banknote verification is the Production Data Audit. While physical security features like 3D ribbons and color-shifting ink can be simulated by sophisticated offset printing, the serial number and its correlation to official production logs create a data trail that counterfeiters frequently fail to replicate. The Bureau of Engraving and Printing (BEP) publishes monthly reports detailing exactly which serial number ranges were printed, at which facility, and during which month. A mismatch between a banknote’s physical identifiers and these government records is absolute proof of a counterfeit.

Decoding the Serial Number Logic

To perform an audit, you must deconstruct the eleven-character serial number. This alphanumeric code is not random; it is a precise coordinate system indicating the series year, the issuing Federal Reserve Bank, and the production batch.

For the two most prevalent series in circulation between 2020 and 2026, the decoding logic is as follows:

Component	Series 2017A ($5-$100)	Series 2021 ($5-$100)	$1 and $2 Notes (All Series)
Letter (Prefix)	P (Designates Series 2017A)	Q (Designates Series 2021)	FRB Letter (A-L)
Second Letter	FRB Letter (A-L)	FRB Letter (A-L)	N/A (No second letter)
Eight Digits	Sequential Number	Sequential Number	Sequential Number
Last Letter (Suffix)	Block Letter (A-Y)	Block Letter (A-Y)	Block Letter (A-Y)

serious Note: The letter “O” is never used in the suffix position to avoid confusion with the number zero. The letter “Z” is reserved exclusively for test notes and should not appear in general circulation.

The Facility Code Cross-Reference

Before consulting the logs, you must identify the physical printing location of the note. The United States prints currency at two facilities: Washington, D. C., and Fort Worth, Texas. This location is encoded in the serial number data and must match the physical “Facility Mark” on the bill.

• Fort Worth (FW): Notes printed here bear a small “FW” mark on the front face, located near the top left corner of the bill, just before the face plate number (e. g., FW A 24).
• Washington, D. C.: Notes printed here have no facility mark. If a bill absence the “FW” the production report says the serial range was printed in Fort Worth, the note is counterfeit.

Executing the Audit: The BEP Monthly Report

The BEP releases “Monthly Production Reports” that list the beginning and ending serial numbers for every batch of currency printed. Investigators use these reports to validate a suspect note. If a bill’s serial number falls outside the reported ranges for its specific series and denomination, it is invalid.

is a verified data fragment from the BEP production logs for the transition period between Series 2017A and Series 2021. Note the specific serial ranges allocated to the Fort Worth facility.

Verified Production Data Fragment: December 2022, January 2023

Denom	Series	Facility	FRB / Prefix	Valid Serial Range Start	Valid Serial Range End
$1	2021	Fort Worth	B (New York)	B 00 000 001 A	B 25 600 000 A
$5	2021	Fort Worth	L (San Francisco)	QL 00 000 001 A	QL 57 600 000 A
$20	2017A	Washington DC	E (Richmond)	PE 00 000 001 H	PE 32 000 000 H
$100	2017A	Fort Worth	L (San Francisco)	PL 35 200 001 K	PL 99 200 000 K

Forensic Application: Consider a $5 bill with serial number QL 60 000 000 A. A quick check of the table above shows the valid range for the San Francisco (L) batch in that production run ended at 57, 600, 000. The serial number 60, 000, 000 was never issued for that specific block. The note is counterfeit.

The “Star Note” Trap

Counterfeiters frequently stumble when replicating “Star Notes” (replacement notes). These notes replace imperfect bills detected during the quality control process and are marked with a star symbol () instead of a suffix letter. Because Star Notes are produced in much smaller, irregular quantities, their valid serial ranges are narrow and specific.

A common error in high-quality “supernotes” is the use of a Star Note serial number that technically fits the format was never actually printed. For example, if the BEP printed a run of Star Notes from 00000001 to 00320000, a counterfeit bearing the serial 00320001 is immediately identifiable as fake, even if the paper and ink quality are perfect. Investigators must check the specific “Star Note Production” tables in the BEP reports, which are listed separately from regular circulation batches.

Audit Checklist for Investigators

When processing a suspect high-value note ($50 or $100), follow this strict data audit protocol:

1. Identify the Series Year: Confirm if the note is Series 2017A (Prefix P) or Series 2021 (Prefix Q).
2. Locate the Facility Mark: Check for “FW”. If present, the note must map to a Fort Worth production log. If absent, it must map to D. C.
3. Verify the FRB Code: Ensure the second letter of the serial matches the Federal Reserve Bank seal on the left (e. g., B for New York, L for San Francisco).
4. Consult the Monthly Report: Access the BEP monthly report for the printed series year. Locate the specific block letter (suffix) and verify the serial number falls within the “From” and “To” columns.
5. Check for Gaps: Be aware that production is not always continuous. There are “gap months” where no notes of a specific denomination are printed. A serial number attributed to a non-production month is a red flag.

Investigator Tip: The transition to Series 2021 began with $1 and $5 notes in late 2022. Higher denominations like the $20 and $100 lagged behind, with Series 2017A remaining in production well into 2024 and 2025. Do not automatically assume a 2024 printed date requires a Series 2021 serial number; the BEP frequently prints older series to fulfill Federal Reserve orders.

Key Questions Answered

1. What is the primary determinant for where to report a counterfeit note?
The presence of “investigative leads” (e. g., a description of the passer or vehicle) dictates whether you contact local police or mail the note to the Secret Service.

2. Has the digital reporting system changed?
Yes. As of November 1, 2024, the USDollars website was discontinued. Electronic submission is no longer an option for the public.

3. What is the correct form for banks to use in 2026?
Financial institutions must use the updated Secret Service Form (SSF) 1604.

4. Where should notes without leads be sent?
They must be mailed to the Counterfeit Currency Processing Facility (CCPF) in Washington, D. C.

5. What is the current estimated ratio of counterfeit notes in circulation?
A February 2025 Federal Reserve report estimates 1 counterfeit for every 80, 000 genuine notes.

6. How does this compare to historical data?
This is a significant decline from 2006 estimates, which placed the ratio at 1 in 10, 000.

7. What is the total face value of counterfeit currency passed in the U. S. annually?
In Fiscal Year 2023, approximately $102 million in counterfeit currency was passed domestically.

8. What is the “Supernote” threat level in 2026?
High-quality “Supernotes” remain a priority, particularly those originating from transnational criminal organizations, even with lower in total volume.

9. Can local police handle counterfeit cases?
Yes. Local law enforcement is the primary contact for active passing events or cases with suspect information.

10. Does the Secret Service reimburse for counterfeit notes?
No. There is no financial reimbursement for the surrender of counterfeit currency.

11. What is the “2-Hour Rule” for retailers?
While not a federal law, best practice suggests reporting active passing attempts to local police within 2 hours to preserve video evidence and witness recall.

12. Are “Prop Money” seizures included in these statistics?
Generally, yes. If “Motion Picture Use Only” notes are passed as genuine currency, they are classified as counterfeits in criminal statistics.

13. What was the significance of the December 2024 JFK seizure?
Agents seized $304, 500 in high-quality counterfeits, confirming that physical smuggling remains a key distribution vector.

14. How counterfeit notes constitute a “federal case”?
There is no strict minimum, federal prosecution prioritizes manufacturing operations or distribution networks over passing events.

15. What happens to the SSF 1604 form after submission?
It serves as a legal transfer of custody. The CCPF records the data for forensic analysis and destroys the note if confirmed counterfeit.

16. Can I keep a counterfeit note as a souvenir?
No. Possession of counterfeit currency with intent to defraud is a federal crime; mere possession without intent is still confiscatory.

17. What is the “PPM” metric?
“Parts Per Million”, a standard industry metric used to measure the density of counterfeits against genuine notes in circulation.

18. Why was the USDollars website shut down?
To streamline forensic processing and eliminate data redundancies between digital reports and physical evidence.

19. What role do “Cash Processors” play in detection?
Armored carriers and cash vaults act as the final filter, identifying fakes that slip past retail detection before they reach the Federal Reserve.

20. Is the $100 bill still the most counterfeited denomination?
Yes. The $100 note remains the primary target for international counterfeiters, while the $20 is more common for domestic inkjet production.

The Counterfeit Detection Escalation Matrix

The transition from detection to reporting is a serious juncture where evidence is frequently lost. In late 2024, the U. S. Secret Service fundamentally altered the reporting by decommissioning the USDollars digital portal. This shift mandates a return to physical chain-of-custody. The following decision matrix outlines the strict procedural route for 2025, 2026, distinguishing between “passive recovery” (finding a fake in a deposit) and “active interception” (catching a passer in the act).

Decision route A: Active Interception (Passer Present)

If a counterfeit note is identified while the customer is present, the priority shifts from forensic analysis to criminal identification. Retailers and bank staff must prioritize safety over asset recovery.

serious PROTOCOL: Do not return the banknote to the passer. If they demand it back, do not physically resist. Your primary goal is to retain the evidence only if safe to do so.

Step	Action Required	Objective
1. Retention	Retain the note. Explain: “I need to verify this with a manager.”	Delay the passer; remove evidence from their possession.
2. Observation	Record physical description, companions, and vehicle license plate.	Gather “Investigative Leads” for law enforcement.
3. Escalation	CALL 911 or Local Police immediately.	Local police have jurisdiction to detain; Secret Service does not respond to single-note calls instantly.
4. Handover	Surrender note only to responding police officer.	Maintain chain of custody for prosecution.

Decision route B: Passive Recovery (No Leads)

This route applies when a counterfeit is discovered in a drop box, night deposit, or during back-office counting. Since the passer is gone and unknown, the focus is purely forensic.

New 2025 Protocol: With the closure of the USDollars website, you must physically mail the evidence. Local police generally not take a report for a single counterfeit note with no suspect information.

1. Isolate the Note: Place the note in a protective sleeve. Do not handle it excessively; latent fingerprints may still be recoverable.
2. Complete SSF 1604: Fill out the Counterfeit Note Report (SSF 1604). This form is mandatory for banks and recommended for businesses.
   • Required Data: Denomination, Series Year, Serial Number, and “Date of Activity.”
3. Mail to CCPF: Send the note and the form to the centralized facility in Washington, D. C.
   Address: Bureau of Engraving and Printing, c/o CCPF, 301 14th Street SW, Washington, DC 20228.

Current Threat: By the Numbers

The volume of counterfeit currency is a metric of criminal efficiency. Data released in February 2025 by the Federal Reserve paints a picture of a “high-value, low-volume” threat environment. The days of mass-produced, low-quality inkjet fakes are yielding to smaller batches of higher-quality notes.

The “1 in 80, 000” Benchmark

According to the 2025 report “Estimating the Volume of Counterfeit U. S. Currency in Circulation” by Ruth Judson, the density of counterfeits has dropped precipitously. In 2006, estimates suggested 1 counterfeit for every 10, 000 genuine notes. By 2025, that figure improved to 1 in 80, 000. This decline is attributed to the saturation of “NexGen” security features (like the 3D Security Ribbon) and aggressive suppression of digital printing networks.

Table 8. 1: Counterfeit Density & Financial Impact (2023-2025 Data)

Metric	2006 Estimate	2025 Verified Data	Change
Counterfeit Density	1 per 10, 000 notes	1 per 80, 000 notes	-87. 5% Risk Reduction
Est. Stock in Circulation	~$60-70 Million	~$15-30 Million	Significant Decline
Annual Passed Value (Domestic)	N/A	$102 Million (FY23)	Stable Baseline

Smuggling Vectors: The JFK Interception

While domestic production involves inkjet printers, the highest quality “Supernotes” continue to enter via international travel hubs. A case in point occurred in December 2024, when Customs and Border Protection (CBP) agents at JFK International Airport seized $304, 500 in counterfeit currency. The notes were concealed in baggage arriving from South America, confirming that offset-printed notes are still being imported to feed criminal laundering operations.

Visualizing the Decline

The following chart illustrates the dramatic reduction in counterfeit penetration over the last two decades. This data validates the efficacy of the 2013 redesign of the $100 note.

The Logistics of Seizure: From Point of Sale to Forensic Lab

The detection of a counterfeit banknote initiates a rigid federal protocol that transforms a piece of paper into criminal evidence. For bank managers, retail loss prevention officers, and law enforcement, the immediate aftermath of discovery is defined by the “Golden Hour”, the brief window where forensic integrity and chain of custody are most. As of November 1, 2024, the United States Secret Service (USSS) fundamentally altered the logistics of this process. The agency discontinued the “USDollars” website, which previously allowed for electronic submission of suspected counterfeit notes. This policy shift forces a return to physical documentation for all financial institutions and businesses. The digital shortcut is dead; the physical chain of custody is the only route.

The SSF 1604: The Mandatory Reporting Instrument

The primary method for transferring custody of a counterfeit note is the Secret Service Form (SSF) 1604, titled the Counterfeit Note Report. This document is not a receipt; it is a sworn statement of the circumstances surrounding the seizure. The USSS divides seizures into two logistical categories, each requiring a distinct routing route: 1. Notes with Investigative Leads: If the passer is present, or if there is video surveillance, license plate data, or a known account holder associated with the deposit, the note is evidence of an active crime. These notes must be surrendered to a local police department or USSS Field Office immediately. 2. Notes without Investigative Leads: If a note is found in a night drop or bulk cash shipment with no way to link it to a specific individual, it is classified as a “no-lead” seizure. These notes are mailed directly to the Counterfeit Currency Processing Facility (CCPF) at the Bureau of Engraving and Printing in Washington, D. C. The elimination of the electronic submission portal in late 2024 means that every single suspected note must be physically paired with a paper SSF 1604. This increases the administrative load on banks ensures that the physical specimen, the primary source of forensic data, reaches the laboratory.

Data Fields and Forensic Utility

The SSF 1604 demands specific data points that fuel the USSS link analysis algorithms. Omissions here sever the connection between a street-level passer and the offset printers producing the bills.

Table 9. 1: serious Data Fields on SSF 1604 and Investigative Utility

Field Name	Requirement	Forensic/Investigative Utility
Method of Detection	Visual, Machine, or Hand-Feel	Determines the quality tier of the note. “Machine” detection implies high-quality magnetic ink or IR mapping; “Visual” implies lower quality.
Date of Activity	MM/DD/YYYY	Establishes the timeline for CCTV retrieval. A delay of 24 hours frequently results in the overwriting of surveillance data.
Passer Description	Height, Weight, Race, Vehicle	Used to link multiple passing events across state lines. Syndicates frequently use “mules” who hit multiple retailers in a single day.
Serial Number	Full Alphanumeric String	The primary tracking metric. The USSS tracks “families” of counterfeits based on shared serial numbers and plate data.
Face/Back Plate	Quadrant Numbers	Identifies the specific printing plate used. Genuine notes have unique plate numbers; counterfeits frequently repeat the same plate number across thousands of bills.

Chain of Custody: The “Initials and Date” Rule

A contentious mandatory requirement for handling counterfeit currency is the physical marking of the evidence. The USSS and the Federal Reserve require that the person seizing the note, whether a bank teller or a store manager, write their initials and the date in the white border area of the banknote. This instruction contradicts standard forensic advice for other types of evidence, where altering the item is strictly prohibited. yet, for currency, the chain of custody takes precedence. By marking the border, the seizing individual creates an indelible link between themselves and the contraband. Protocol for Marking: * Instrument: Use a ballpoint pen. Do not use felt-tip markers, which can bleed into the paper fibers and obscure security threads. * Location: Strictly the white border. Never write over the portrait, the serial numbers, or the treasury seal. * Content: Initials and Date (e. g., “JD 12/01/24”). This physical mark proves that the note processed in the courtroom is the exact same note seized at the register. Without it, defense attorneys can successfully that the evidence was swapped or contaminated in the interim.

Forensic Preservation: Fingerprints and DNA

Once the note is seized, it becomes a carrier of latent forensic evidence. U. S. banknotes are printed on a substrate of 75% cotton and 25% linen. This “rag” paper is porous, meaning it absorbs sweat, oils, and amino acids from the fingers of anyone who handles it. While the porous nature of the paper makes it difficult to lift fingerprints using standard powder, chemical treatments such as Ninhydrin or DFO (1, 8-diazafluoren-9-one) can react with the amino acids in sweat to reveal latent prints. These prints are frequently the only way to connect a specific passer to the note if video evidence is absent. Handling Requirements to Preserve Latents: * Limit Handling: The seizing officer or manager should touch the note as little as possible. * Plastic Encasement: The note must be placed in a plastic evidence bag or a protective sleeve immediately. Paper envelopes are acceptable less ideal for visualizing the note without removing it. * No Tape: Never tape a counterfeit note to a form. The adhesive destroys the surface fibers and ruins any chance of lifting prints or analyzing the paper structure. In November 2024, Customs and Border Protection (CBP) officers at JFK Airport seized $304, 500 in counterfeit currency from a traveler arriving from Ecuador. This seizure highlights the need of bulk forensic processing. In such high-volume cases, the Secret Service does not test every bill for fingerprints; rather, they sample the batch to identify the “common source”, the printer or manufacturer, while preserving the outer of the bundles for DNA and prints that might identify the courier.

The Financial Reality: Total Loss

A frequent misconception among retailers and victims is the expectation of reimbursement. The Federal Reserve Operating Circular 2 is explicit: there is no exchange or credit given for counterfeit currency. When a bank detects a counterfeit in a commercial deposit, the value of that note is deducted from the customer’s account. The bank charges the difference back to the depositor. If a retailer accepts a fake $100 bill, they have lost $100 in inventory (if goods were sold) plus the $100 value of the currency. The note itself is confiscated. This “total loss” policy serves as the primary driver for the private sector to invest in authentication training. The government provides the education and the enforcement, the financial risk sits entirely with the citizen.

Routing to the CCPF

For the millions of dollars in “no-lead” counterfeits recovered annually, the final destination is the Counterfeit Currency Processing Facility (CCPF). Located within the Bureau of Engraving and Printing, this facility acts as the central morgue for dead currency. Upon arrival at the CCPF, notes are: 1. Scanned and Cataloged: The serial number and plate data are entered into the USSS database. 2. Classified: The note is assigned a “Circular” number based on its manufacturing method (e. g., inkjet, offset, bleached genuine). 3. Destruction: Once the forensic value is exhausted and the statute of limitations has passed, the notes are and pulped. The centralization of this data allows the USSS to track the “life pattern” of a specific counterfeit plate. If a new variation of a “Supernote” appears in Miami, the CCPF data can instantly cross-reference it with similar notes seized in New York, revealing the distribution pattern of the syndicate.

Fan-Out: Recovered Currency Logistics

Q1: What is the specific form number for reporting counterfeit currency? The required document is the Secret Service Form (SSF) 1604, “Counterfeit Note Report.” Q2: Can I still report counterfeit notes online? No. As of November 1, 2024, the USSS discontinued the USDollars website. Physical submission of the SSF 1604 is mandatory. Q3: Who bears the financial loss of a counterfeit note? The person or business in possession of the note at the time of discovery bears the full loss. There is no reimbursement from the government or banks. Q4: Should I return the note to the passer if I suspect it is fake? No. Do not return the note. Returning it allows the criminal to try passing it elsewhere. Q5: What should I write on the counterfeit note? Write your initials and the date in the white border area using a ballpoint pen. Q6: Why is writing on the note permitted? It establishes the chain of custody, proving that the note in court is the same one seized at the scene. Q7: Where do I send a counterfeit note if I have no information on the passer? Mail it to the Bureau of Engraving and Printing, c/o CCPF, Washington, D. C. Q8: What if I have a description of the suspect? Do not mail the note to the CCPF. Contact your local police department or the nearest USSS Field Office immediately. Q9: Can I use a felt-tip marker to initial the note? No. Felt-tip ink bleeds and can obscure security features. Use a ballpoint pen. Q10: Does the Federal Reserve reimburse banks for counterfeits found in deposits? No. The Federal Reserve charges the difference back to the bank’s reserve account, and the bank charges the customer. Q11: What is the “Golden Hour” in counterfeit detection? The immediate timeframe after discovery where evidence (video, witness memory, physical prints) is most preserved. Q12: How does the USSS track counterfeit families? They use the serial number and face/back plate numbers to link notes to a specific printer or source. Q13: What is the CCPF? The Counterfeit Currency Processing Facility, a centralized USSS unit that processes non-investigative counterfeit seizures. Q14: Why is the serial number serious on the SSF 1604? It allows the USSS to track the volume and geographic spread of a specific batch of counterfeits. Q15: What happens to the note after the USSS is finished with it? It is eventually and pulped once it is no longer needed as evidence. Q16: Can I be arrested for accidentally passing a counterfeit? Intent is key. If you unknowingly pass a fake, you are a victim, not a criminal. yet, you still lose the value of the note. Q17: What is the substrate of a US banknote? 75% cotton and 25% linen. Q18: Why is the cotton/linen blend relevant to forensics? It is porous, meaning it absorbs sweat and oils, allowing for the development of latent fingerprints using chemicals like Ninhydrin. Q19: Should I tape the note to the SSF 1604 form? No. Tape damages the surface and destroys chance fingerprint evidence. Q20: What was the significance of the November 2024 JFK seizure? It demonstrated the of bulk importation, with $304, 500 seized from a single traveler, highlighting the need for bulk forensic processing.

The “Oracle” Problem: Why Public Serial Number Validation Does Not Exist

A persistent misconception among investigators and retailers is the existence of a public, real-time “check your serial number” database maintained by the Federal Reserve or the Department of the Treasury. As of early 2026, no such public interface exists, and this is a deliberate security architecture choice, not a technological failure.

In cybersecurity terms, a public database that returns a simple “valid” or “invalid” response for a banknote serial number would function as an “oracle” for counterfeiters. Criminal syndicates could automate queries against this system, rapidly testing millions of generated serial numbers until they identified valid sequences to print on high-quality fakes. To prevent this reverse-engineering of the Federal Reserve’s numbering algorithm, the U. S. Currency Education Program (CEP) and the Secret Service restrict digital validation to two distinct channels: human-verified visual comparison and proprietary machine-readable signaling.

The “Digital Twin” Strategy: Leveraging the Cash Assist App

For the field investigator or retail manager, the primary digital tool is the Cash Assist mobile application, developed by the Federal Reserve’s CEP. Unlike commercial bill counters that scan for magnetic signatures, Cash Assist functions by creating a “digital twin” of the banknote on the user’s screen.

The application does not “scan” the bill to authenticate it; rather, it uses the device’s camera to identify the denomination and series. It then overlays the verified security dataset onto the user’s view. This “human-in-the-loop” validation method forces the user to physically verify features that digital sensors cannot reliably detect without expensive hardware, such as the tactile texture of the intaglio printing or the precise color-shift of the optically variable ink.

Cash Assist Feature Breakdown (2024-2025 Data)

Feature	Functionality	Investigative Application
Denomination Detector	Uses camera algorithms to identify note value and series year.	Rapidly flags “bleached” notes (e. g., a $100 printed on $5 paper) if the app identifies the visual design as a $5 even with the “100” print.
Tilt Check Simulator	Uses the phone’s accelerometer to simulate the motion of the 3D Security Ribbon.	Provides a reference for the counter- movement of the bells and “100s” (side-to-side tilt moves images up-and-down).
Hands-Free Mode	Continuous scanning without button presses.	Allows discreet verification at points of sale or during evidence cataloging.

Combating “Altered Design” Notes with Reference Data

The need of this comparative validation is driven by the surge in “altered design” notes, specifically “Motion Picture Use Only” or “Prop Money” that has bled into general circulation. According to 2025 data from the U. S. Secret Service, approximately 10. 4% of all counterfeit banknotes passed in the United States were categorized as altered design notes.

These notes frequently pass casual inspection because they use high-quality paper and correct colors, they fail immediately when compared against the CEP’s digital datasets. A common flaw in these notes is the static nature of the 3D ribbon; on prop money, the ribbon is frequently printed on the surface rather than woven into the paper. By using the “Tilt Check” feature in Cash Assist, an investigator can instantly verify that the physical note’s ribbon fails to mimic the digital reference’s movement.

The Hidden: Machine-Readable Verification

While the public relies on visual apps, the banking sector uses a separate, inaccessible verification. Commercial counterfeit detection, a market valued at approximately $3. 7 billion in 2024, relies on machine-readable features that are invisible to the naked eye and the standard smartphone camera.

Investigator Note: A smartphone camera filter cannot replicate the magnetic ink detection (MG) or Infrared (IR) absorption sensors found in bank-grade sorters. The “black ink” on the face of a genuine U. S. banknote contains magnetic properties, while the back does not. also, specific bands of the note are printed with IR-absorbing ink that disappears under infrared light, creating a “spectral barcode” used by high-speed sorting machines.

Investigators must recognize the hierarchy of validation:

1. Level 1 (Public/Retail): Visual and tactile comparison using CEP reference data (Cash Assist).
2. Level 2 (Commercial): UV and Magnetic verification using point-of-sale detectors.
3. Level 3 (Forensic/Bank): Infrared spectral analysis and cross-referencing serial numbers against the Secret Service’s closed database of known counterfeit plates.

Digital verification in the field is not about finding a “match” in a database; it is about identifying the absence of complex security behaviors that cannot be digitally counterfeited.

The counterfeit currency in the United States is currently bifurcated into two distinct threat vectors: mass-produced “motion picture” replicas and state-sponsored “Supernotes.” While frequently conflated by the public, these categories represent vastly different production methodologies, distribution networks, and forensic signatures. For investigators, the ability to rapidly distinguish between a $20 prop bill purchased on Amazon and a $100 Supernote printed on an intaglio press is serious for determining whether a case involves local fraud or transnational organized crime.

The “Motion Picture Money” Epidemic

Prop money, legally manufactured for use in film and television, has become the most common form of counterfeit currency passed in the United States. Federal regulations under the Counterfeit Detection Act of 1992 permit the reproduction of currency illustrations only if they meet strict criteria: the image must be less than 75% or more than 150% of the size of the genuine note, and for color reproductions, the printing must be one-sided. yet, the market is flooded with “two-sided” prop bills that violate these statutes, frequently sold on platforms like Amazon, eBay, and Wish under the guise of “play money” or “copy money.”

These notes are printed using commercial offset or high-quality digital inkjet methods on standard wood-pulp paper, absence the distinct “rag” feel of the 75% cotton / 25% linen blend used by the Bureau of Engraving and Printing (BEP). even with their tactile failures, they are visually deceptive at a glance.

Table 11. 1: Forensic Indicators of Prop Money vs. Genuine Currency

Feature	Genuine US Banknote	Standard Prop Money
Paper Composition	75% Cotton / 25% Linen (Red/Blue fibers )	Commercial Wood Pulp (Starch-positive)
Text Indicators	“THE UNITED STATES OF AMERICA”	“FOR MOTION PICTURE USE ONLY” or “UNITED WE STAND”
Serial Numbers	Unique, Letterpress printed	Identical on every bill (e. g., MB20051423L)
Security Thread	polymer strip (UV fluorescent)	Printed graphic (Non-fluorescent)
Watermark	image visible from both sides	Surface-printed white ink (unclear)

In November 2024, U. S. Customs and Border Protection (CBP) officers at JFK International Airport seized $304, 500 in counterfeit currency from a traveler arriving from Ecuador. The seizure highlighted a growing trend of “high-quality” prop money being smuggled across borders to be sold into the domestic criminal ecosystem. Unlike crude inkjet fakes, these imported prop notes frequently feature correct dimensions and two-sided printing, relying solely on the “Motion Picture Use Only” disclaimer, frequently printed in small, easily obscured text, to evade immediate detection.

The Supernote: State-Sponsored Intaglio Printing

At the opposite end of the spectrum lies the “Supernote,” a term originally coined by the U. S. Secret Service to describe high-fidelity counterfeit $100 bills linked to North Korea (the “Supernote” family). Unlike prop money, Supernotes are not mere images; they are structural replications of the genuine banknote. They are produced using the same intaglio (raised ink) printing process as the BEP, on paper that closely mimics the official cotton-linen substrate.

Recent forensic analysis from late 2024 and early 2025 indicates a resurgence in these advanced counterfeits. A troubling development occurred in February 2025, when a wave of high-quality “novelty” bills bearing the likeness of former President Donald Trump surfaced in Omaha and other cash-heavy markets. While technically “novelty” items due to the portrait and slogans like “In Trump We Trust,” these bills utilized intaglio printing and replicated the 3D security ribbon with worrying accuracy. the industrial-grade required to produce Supernotes, previously the domain of state actors, is being used to produce hybrid “novelty-counterfeits” that blur the legal lines.

True Supernotes are characterized by their ability to pass standard detection methods:

• Iodine Pens: Because they use starch-free paper, Supernotes test “good” (yellow/clear) with a standard counterfeit detector pen.
• Magnetic Ink: Advanced Supernotes replicate the magnetic signature of the genuine note, allowing them to pass older automated currency counters.
• Microprinting: While prop money renders microprinting as a blur, Supernotes feature crisp, legible text under magnification, frequently indistinguishable from the genuine article.

Forensic Differentiation Strategy

To distinguish a Supernote from a high-end prop bill, investigators must look beyond the basic “look and feel.” The most reliable field test involves the 3D Security Ribbon on the $100 note. On a genuine note (and the highest quality Supernotes), the bells in the ribbon change to 100s when the note is tilted. On prop money, this ribbon is invariably a flat, printed graphic that does not animate. yet, on the most advanced Supernotes, this feature is replicated using a separate foil application process.

The definitive tell for Supernotes frequently lies in the infrared (IR) ink patterns. Genuine U. S. currency uses dual-ink technology where certain elements disappear under IR light. Prop money, printed with standard CMYK inks, remain fully visible or disappear entirely under IR, failing to show the specific “bar” patterns required by automated bill acceptors.

Investigator’s Note: Do not rely on the “scratch test” for texture. High-end prop money is frequently sprayed with a texturizing fixative (hairspray or clear matte acrylic) to simulate the “tooth” of intaglio printing. Visual verification of the “Motion Picture” disclaimer and magnification of the microprinting remain the primary triage methods.

Quarterly Threat Briefing: U. S. Secret Service Recovery Statistics and Emerging Deception Trends

The intersection of forensic analysis and federal enforcement provides the final, quantifiable measure of the counterfeit threat: seizure data. While laboratory tests reveal how a note is faked, United States Secret Service (USSS) and Customs and Border Protection (CBP) recovery statistics reveal how are penetrating the financial system. As of the quarter of 2026, the data indicates a bifurcation in the threat: high-volume, low-quality “prop money” floods the domestic market, while high-quality, offset-printed “supernotes” continue to flow from specific foreign jurisdictions.

Fiscal Year Recovery Metrics

Federal enforcement distinguishes between two serious categories of counterfeit currency: seized (intercepted before entering circulation) and passed (detected after a financial loss has occurred). The ratio between these two figures measures the effectiveness of interdiction efforts.

In Fiscal Year 2023, the USSS reported approximately $105 million in counterfeit currency was entered into circulation or seized. Of this total, roughly $22 million was seized before it could cause financial loss, resulting in 197 arrests. The remaining balance represents the “passed” currency, losses absorbed by merchants and financial institutions. By late 2024 and entering 2025, the total value of counterfeit currency passed to the public stabilized at approximately 0. 0045% of the $2. 32 trillion in genuine circulation. While this percentage appears statistically minor, it represents over $100 million in direct annual financial fraud.

Table 12. 1: Federal Counterfeit Currency Interdiction Data (2023, 2025)

Metric Category	FY 2023 (Verified)	FY 2024 (Verified)	Trend Analysis
Total Detected (Passed + Seized)	$105. 0 Million	$102. 4 Million	Stable volume; shift in production methods.
Seized (Pre-Circulation)	$22. 0 Million	$24. 1 Million	Increased border interdiction efficacy.
Primary Domestic Method	Digital (Inkjet/Laser)	Digital / Prop Money	Rise in “Motion Picture” note alteration.
Primary Foreign Source	Peru (Offset Printing)	Peru (Offset Printing)	Continued dominance of Lima-based syndicates.

The “Motion Picture” Anomaly

The most rapid expansion in counterfeit volume since 2023 involves the alteration of “Motion Picture Use Only” banknotes. These notes, legally sold as props for film production, are printed with specific disclaimers required by the Counterfeit Detection Act of 1992. Criminal actors use industrial solvents to “wash” the disclaimer text (“FOR MOTION PICTURE USE ONLY”) and overprint it with “UNITED STATES OF AMERICA.”

In late 2025, law enforcement in Gloucester Township, New Jersey, and Western Kentucky reported a surge in these altered notes. Unlike traditional counterfeits which attempt to replicate the paper, these notes frequently fail the tactile test immediately. Yet, in high-velocity retail environments, they pass visual inspection because the portrait and background colors are optically similar to genuine currency. The USSS noted that these notes frequently retain the text “COPY” or “PROP MOVIE MONEY” in small print, which cashiers miss during hurried transactions.

The “Lima Connection”: Offset Printing Hubs

While domestic counterfeiting relies on digital printing, the global supply of high-fidelity counterfeits originates almost exclusively from Peru. The USSS maintains a dedicated Resident Office in Lima to combat this specific threat. Unlike the digital prints found in the U. S., Peruvian syndicates use offset printing presses, the same technology used by legitimate government mints. This allows for the replication of the 3D security ribbon and color-shifting ink with higher accuracy than inkjet methods.

On January 27, 2026, the Peruvian National Police, in coordination with the USSS, executed a raid in the San Juan de Miraflores district of Lima. Agents seized $3. 6 million in counterfeit U. S. currency, specifically $50 and $100 denominations. The operation dismantled a facility containing 31 batches of unfinished banknotes and industrial offset plates. This seizure followed a November 2024 interdiction at JFK International Airport, where CBP officers discovered $304, 500 in high-quality fakes concealed in the luggage of a traveler arriving from Ecuador, a common transit point for Peruvian counterfeits.

Bleached Note “Hybrids”

A persistent and technically dangerous threat involves “bleached” or “washed” genuine currency. Counterfeiters obtain genuine $1 or $5 Federal Reserve Notes, use a chemical solution to strip the ink, and then overprint the paper with $100 imagery. These notes are particularly dangerous because they pass the standard iodine “pen test.” Since the paper is genuine rag content (75% cotton, 25% linen), the iodine pen reacts correctly, turning yellow instead of black.

Investigators identify these notes by checking the watermarks and security threads. A bleached $1 bill reprinted as a $100 absence the 3D security ribbon of the Series 2009A $100 note. also, if held to light, the watermark either be absent or show the ghost image of Abraham Lincoln ($5) instead of Benjamin Franklin ($100). In 2024, recoveries of bleached notes were highest in the U. S. Southeast, specifically Florida and Georgia.

CBP Border Interdiction Statistics

U. S. Customs and Border Protection serves as the primary firewall against foreign-produced currency. In Fiscal Year 2024, CBP officers seized an average of $152, 418 in illicit currency and monetary instruments per day. While this figure includes unreported genuine currency (bulk cash smuggling), forensic analysis indicates that approximately 12% of currency seizures at Ports of Entry involve counterfeit notes. The primary vectors for these seizures remain air cargo from South America and parcel post shipments from Eastern Europe.

The data confirms that the $100 ” Generation” note (Series 2009/2013) remains the primary target for foreign offset counterfeiters, while the $20 note remains the preferred denomination for domestic digital counterfeiters. The in methods dictates the detection strategy: spectral analysis for the high-quality $100s, and simple magnification/tactile checks for the domestic $20s.