How to Check If Money Is Real: Feel, Tilt, and Pen Tests

To check if money is real, use the three-step method bank tellers use: feel the paper for raised ink, tilt the bill to see color-shifting numerals, and hold it up to light to check the watermark and security thread. Every U.S. bill of $5 or higher carries these features, and you can verify all of them in seconds without any equipment. Catching a fake at the moment of the transaction matters because the federal government does not reimburse anyone for counterfeit currency. Once you accept it, the loss is yours.

Feel, Tilt, and Light: The Hand Check

Genuine U.S. bills are printed on a blend of 75 percent cotton and 25 percent linen.¹ The paper has a crisp, slightly rough texture that feels nothing like copy paper. The printing process presses ink into the paper under enormous pressure, leaving raised lines you can feel with a fingernail. Run your nail across the portrait’s jacket or along the borders of any bill $5 or higher. You should feel distinct ridges. Bills made on inkjet or laser printers feel flat and smooth.

Now tilt the bill. On denominations $10 and above, the large numeral in the lower right corner shifts from copper to green as you rock the note. The $100 bill carries one feature no other denomination has: a blue 3-D security ribbon woven directly into the paper.¹ Images of bells and the number 100 appear along the ribbon and shift direction as you tilt the note. Because the ribbon is woven into the paper rather than printed on top, it is one of the hardest features to counterfeit.

Hold the bill up to any light source next. On denominations $5 and above, two things appear: a thin security thread running vertically through the paper, and a faint watermark to the right of the portrait.¹ The watermark should match the portrait on the front. If a $20 shows Andrew Jackson on the face but a different figure in the watermark, the bill has been altered or is fake. The security thread sits in a different position on each denomination, and tiny text on the thread names the bill it belongs to.

Two smaller details support the main checks. Red and blue fibers are embedded throughout the paper during manufacturing, sitting inside the fibers rather than printed on top, so they can’t be scraped off or smudged. Bills $5 and above also carry microprinting in several locations. On a $100 bill, tiny text reading “THE UNITED STATES OF AMERICA” runs along Franklin’s collar, and “USA 100” appears near the portrait watermark.² On a genuine bill these letters stay sharp under a magnifier. On a counterfeit they blur into solid lines or vanish.

What About $1 and $2 Bills

The $1 and $2 bills carry almost none of these protections. They have no security thread, no watermark, no color-shifting ink, and no microprinting.¹ The paper feel and the embedded fibers are the only checks. Counterfeiters rarely bother with $1 and $2 notes because the payoff is small, but there is a related fraud worth knowing about: bleaching a genuine $1 or $5 and reprinting it as a $100. The paper is real, so the feel test passes. That is exactly why the tilt and light checks matter on high-denomination bills. A note that feels right but shows no watermark, or the wrong face in the watermark, is a bleached bill.

Detection Pens, UV Lights, and Their Limits

Counterfeit detection pens are the cheapest tool behind most retail counters. The iodine-based ink reacts with the starch in ordinary wood-pulp paper, leaving a dark brown or black mark. On genuine currency, which contains no starch, the mark stays pale yellow or clear. The catch is that these pens only test the paper. A bill printed on bleached genuine paper passes every time, which means the pen catches unsophisticated fakes and misses the dangerous ones.

Ultraviolet light is faster and more reliable, because each denomination’s security thread glows a specific color under UV. According to the Secret Service, a $5 bill glows blue, a $10 glows orange, a $20 glows pink, a $50 glows yellow, and a $100 glows green.² A thread that doesn’t glow, glows the wrong color, or isn’t there at all is a red flag. UV lamps built for currency checking are widely available.

Higher-end counting machines used by banks and cash-heavy businesses add magnetic ink detection. The Bureau of Engraving and Printing uses magnetic ink in specific areas of each bill, and automated scanners read these signatures and reject notes that don’t match. For anyone processing high volumes of cash, a machine that combines UV, magnetic, and watermark detection catches fakes that any single method would miss.

If You Already Took a Counterfeit

The federal government does not reimburse individuals or businesses for counterfeit currency. Federal Reserve Banks will not accept counterfeit deposits, and if a bank discovers a fake in a batch after the fact, the depositor’s account is charged for the difference.³ The point-of-sale check is the only real protection.

Unknowingly spending a counterfeit you received in change isn’t a federal crime. Prosecution under 18 U.S.C. § 472 requires proof of intent to defraud, meaning you knew the bill was fake when you passed it.⁴⁵ with fines for individuals reaching $250,000 under the general federal sentencing statute.⁶

Preserving Evidence and Reporting

If a suspicious bill turns up during a transaction, do not return it to the person who handed it to you. Once the note leaves your hands, investigators lose the physical evidence and any fingerprints. Handle it as little as possible, place it in an envelope, and write your initials and the date in the white border area. Make a copy of both sides if you can.

Try to remember details about the person: appearance, clothing, vehicle, and the time and location of the transaction. Then contact your local police department or the nearest U.S. Secret Service field office.⁷ Individuals can reach out to a field office directly.⁸

Businesses that take counterfeit losses can generally deduct them as theft losses under IRC Section 165. For individuals, the personal theft loss deduction became available again in 2026 after the Tax Cuts and Jobs Act restriction expired, though a single fake bill won’t produce a meaningful deduction.⁹ A business hit with a batch of fakes should document the incident and talk to a tax professional.

New Bill Designs Are Coming

The Bureau of Engraving and Printing is rolling out redesigned bills over the next decade, starting with a new $10 note expected in 2026, followed by the $50 in 2028, the $20 in 2030, the $5 in 2032, and the $100 in 2034.¹⁰ Each redesign brings new security features aimed at staying ahead of increasingly sophisticated counterfeiting technology. The BEP typically reveals new designs six to eight months before the bills enter circulation.

Older versions stay legal tender after each launch, so both designs will circulate side by side for years. If you handle cash regularly, plan to learn the new security features for each denomination as it rolls out. The features you check today won’t be the only ones you need to know a few years from now.

1
USCurrency.gov. Dollars in Detail: Your Guide to U.S. Currency
2
Secret Service. Know Your Money
3
Federal Reserve Financial Services. Handling Counterfeit Currency
4
Office of the Law Revision Counsel. 18 USC 472 – Uttering Counterfeit Obligations or Securities
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Office of the Law Revision Counsel. 18 USC 471 – Obligations or Securities of United States
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Office of the Law Revision Counsel. 18 USC 3571 – Sentence of Fine
7
U.S. Secret Service. Reporting Suspected Counterfeit Currency to the United States Secret Service
8
U.S. Currency Education Program. Report a Counterfeit
9
Taxpayer Advocate Service (TAS). IRS Chief Counsel Advice on Theft Loss Deductions for Scam Victims
10
Bureau of Engraving and Printing. Currency Redesign