A bleached bill is a genuine one- or five-dollar note that a counterfeiter has chemically stripped of its ink and reprinted as a fifty or a hundred. Because the paper is real U.S. currency paper, bleached bills sail past the tests most people rely on, including the yellow detection pen at the register. Catching one means checking the features built into the paper itself: the watermark, the security thread, the color-shifting ink, and the raised texture of the printing.
Why the Scheme Works
U.S. currency is printed on a blend of 75 percent cotton and 25 percent linen, with small red and blue security fibers woven throughout.1U.S. Currency Education Program. Currency Facts Soaking a one or a five in a chemical bath dissolves the printed ink but leaves that paper intact. A high-resolution consumer printer then lays a fifty or hundred-dollar design on top. The finished note feels like real money because it started as real money.
Ones and fives are cheap to buy in bulk, which is why counterfeiters use them. A washed one has no watermark or security thread at all, since the one-dollar bill was never made with either. A washed five carries a watermark and thread, but both belong to a five, not to whatever denomination is now printed on the surface. That mismatch is the whole tell.
Why Counterfeit Detection Pens Don’t Catch Them
Those yellow marker pens contain an iodine solution that reacts with starch in ordinary wood-pulp paper. Genuine currency paper contains no starch, so the mark stays clear or light yellow, signaling “real.” A bleached bill passes every time, because the paper actually is real. The pen answers a question — is this wood-pulp paper? — that a bleached bill was never going to fail.
How to Spot a Bleached Bill by Hand
The features that expose a washed note are the ones manufactured into the paper during production. They survive bleaching, and no consumer printer can add, move, or change them.
Check the Watermark Against the Denomination
Hold the bill up to a light. Every denomination from the five upward has a watermark visible from both sides that should match the printed denomination:2U.S. Currency Education Program. Quick Reference Guide
- $5: two watermarks of the numeral 5
- $10: Alexander Hamilton
- $20: Andrew Jackson
- $50: Ulysses S. Grant
- $100: Benjamin Franklin
A bleached five reprinted as a hundred will show a numeral “5” watermark where Franklin should be. This one check catches most washed bills and takes about three seconds.
Read the Security Thread
Each denomination has a plastic security thread embedded vertically in a unique position, inscribed with text identifying the value.3United States Secret Service. Know Your Money A $5 thread reads “USA FIVE,” a $10 reads “USA TEN,” and so on. If a bill claims to be a hundred but the thread reads “USA FIVE” and sits in the wrong spot, it’s washed. The thread is sealed between layers of the paper, so no chemical or scrubbing process can alter it.
Look for Color-Shifting Ink
Bills of $10 and higher have a numeral in the lower-right corner printed with ink that shifts from copper to green when you tilt the note at about a 45-degree angle.2U.S. Currency Education Program. Quick Reference Guide The five-dollar bill doesn’t have this feature. A bleached five reprinted as a fifty or hundred will show a flat, non-shifting numeral. Consumer printers cannot reproduce optically variable ink.
Find the 3-D Ribbon on a $100
The current $100 bill has a blue security ribbon woven directly into the paper, containing images of bells and “100s” that appear to shift as you tilt the note.4U.S. Currency Education Program. $100 Note It’s woven in, not printed on. No other denomination has this ribbon, so any bleached bill reprinted as a hundred is missing it entirely. This is one of the easiest ways to catch a fake hundred.
Feel the Printing
Genuine currency uses intaglio printing, which presses ink into the paper under heavy pressure and produces a slightly raised texture the Bureau of Engraving and Printing compares to fine sandpaper.5Bureau of Engraving and Printing. The Buck Starts Here: How Money is Made Run a fingernail across the portrait, the scrollwork, or the denomination numeral. You should feel distinct ridges. A bleached bill reprinted with consumer ink feels flat and smooth in those same spots.
Check the Microprinting
Denominations of $5 and higher include tiny printed text in several locations, such as “THE UNITED STATES OF AMERICA” or “USA,” that should stay crisp and legible under magnification.6U.S. Currency Education Program. Dollars in Detail Brochure A washed bill either lacks microprinting or shows blurred, filled-in text. A phone camera zoomed in will show the difference.
UV Light and Magnetic Checks
If you handle cash regularly, a UV lamp is the single most reliable tool. Each denomination’s security thread glows a specific color under ultraviolet light:3United States Secret Service. Know Your Money
- $5: blue
- $10: orange
- $20: pink
- $50: yellow
- $100: green
If a supposed hundred glows blue, you’re holding a bleached five. A basic UV flashlight costs under $15 and gives an answer a detection pen never can.
Magnetic verification adds another layer. Genuine currency ink contains iron particles that produce a readable magnetic signature; standard inkjet and laser ink does not. Most commercial bill counters and point-of-sale scanners include both UV and magnetic sensing.
If You End Up With One
Don’t try to spend it, and don’t hand it back to whoever gave it to you. Contact your local police or the nearest Secret Service field office.7U.S. Currency Education Program. Report a Counterfeit Handle the note as little as possible to preserve any fingerprint evidence. If you’re a business, the Secret Service recommends writing your initials and the date on the upper-right margin of the back of the bill — never in the image area — and noting a description of the person who passed it and any vehicle details.8GovernmentAttic.org. United States Secret Service Counterfeit Currency Handbook Don’t write “counterfeit” on the note or use correction fluid on it.
The hard part is financial. Neither the government nor your bank is required to reimburse you for a counterfeit bill you accepted in good faith. The Office of the Comptroller of the Currency treats disputes between customers and banks over the origin of a fake note as factual disagreements, and the bank can claim you got the bill somewhere else after leaving.9HelpWithMyBank.gov. The Bank Gave Me a Fake Bill but Won’t Reimburse Me. What Can I Do? Whoever is holding the note when it’s identified as fake absorbs the loss.
A Note on Intent
Federal counterfeiting charges require the government to prove intent to defraud.10Office of the Law Revision Counsel. 18 USC 472 – Uttering Counterfeit Obligations or Securities Unknowingly receiving a washed bill and unknowingly spending it isn’t a crime. Once you know a bill is fake, though, trying to pass it to someone else is a felony, even if you feel cheated about being stuck with the loss. Turn it in.