How to Tell if a Dollar Bill Is Real or Counterfeit

To tell if a dollar bill is real or counterfeit, run three quick checks: feel the paper for a crisp texture and raised ink, tilt the note to watch the large numeral shift from copper to green, and hold it up to a light to see the embedded security thread and watermark. Counterfeits are rare — roughly one for every 40,000 to 80,000 genuine bills in circulation1Board of Governors of the Federal Reserve System. Estimating the Volume of Counterfeit U.S. Currency in Circulation — but if one lands in your hand, the loss is yours. Nobody reimburses you for a surrendered counterfeit.2Federal Reserve Financial Services. Handling Counterfeit Currency Checking at the point of transaction matters more than catching the problem later.

Feel the Paper

Genuine U.S. currency is printed on a blend of 75 percent cotton and 25 percent linen, with tiny red and blue fibers scattered through the sheet.3Bureau of Engraving and Printing. The Buck Starts Here: How Money Is Made That makes real bills feel distinctly different from copy paper — crisp, slightly rough, never limp or waxy. If a bill feels too smooth, too thick, or too soft, keep looking.4U.S. Currency Education Program. How to Check Your Money

Part of the texture comes from intaglio printing, where huge pressure forces paper into engraved plates. The result is raised ink you can feel with a fingernail, especially on the portrait, the denomination numerals, and the border lettering. Run your thumbnail across Franklin’s coat on a $100 and you should feel a slight vibration from the ridges. Inkjet and laser counterfeits leave the ink flat on the surface — the bill may look right, but it feels wrong.

Tilt the Note

On every denomination of $10 and higher, the large numeral in the lower-right corner is printed with color-shifting ink that moves from copper to green as you rock the bill.5USCurrency.gov. Dollars in Detail: Your Guide to U.S. Currency The shift should be obvious. A flat, barely changing numeral is a red flag. The $5 doesn’t have color-shifting ink, so don’t look for it there.6U.S. Secret Service. Know Your Money

The $100 has two more tilt features. The Bell in the Inkwell is a copper bell printed inside a copper inkwell; as you tilt the note the bell shifts to green and seems to appear and disappear. The 3-D Security Ribbon is a blue stripe woven into the paper, not printed on it. Tilt the bill back and forth and images of bells and the number 100 shift side to side; tilt left and right and they move up and down.7USCurrency.gov. $100 Note That three-dimensional motion is one of the fastest ways to authenticate a hundred.

Hold It to Light

Every denomination from $5 up has a thin plastic security thread embedded vertically in the paper.8U.S. Currency Education Program. Quick Reference Guide Hold the bill to light and the strip appears with the denomination printed on it in tiny text. The position differs by denomination on purpose, so a bleached and reprinted bill will have the thread in the wrong place.

Thread position and UV color by denomination:4U.S. Currency Education Program. How to Check Your Money

Notice the alternating pattern. Bleach a $5 (thread on the left) and reprint it as a $10 (thread should be on the right) and the position gives it away instantly. A cheap UV flashlight in the 365nm range triggers the glow clearly, and even a standard blacklight works for a quick check.

A watermark sits in the blank space to the right of the portrait on bills $5 and up. Hold the note to light and a faint image appears; it should match the person pictured on the bill. The watermark reads from both sides because it’s formed in the paper itself, not printed on it, which means it can’t be added to a fake after the fact.4U.S. Currency Education Program. How to Check Your Money

Check the Microprinting

Tiny text is hidden in several places on bills $5 and up. To the naked eye it reads as a line or decorative border; under magnification the words become legible. On the $20, “USA20” runs along the border of the blue “TWENTY USA” ribbon to the right of the portrait, and “THE UNITED STATES OF AMERICA 20 USA 20” sits in black below the Treasurer’s signature.10USCurrency.gov. $20 Note Issued 2003 to Present Features Each denomination hides microprinting in different spots, so counterfeiters can’t rely on a single template.

This is where fakes fall apart most reliably. Reproducing text that small takes engraving resolution that consumer printers cannot match, so on counterfeits the microprinting looks smudged, blurry, or missing. A magnifying glass or a phone camera with macro mode settles it in seconds.

Check the Seals and Serial Numbers

Every genuine bill carries two seals on the front: a black Federal Reserve seal to the left of the portrait and a green Treasury seal to the right. The Treasury seal has a sawtooth border, and those points should be sharp, even, and unbroken. On counterfeits they often blur together or come out uneven.

Serial numbers appear twice on the front in green ink. On bills from $5 up (Series 1996 onward), the number starts with two letters: the first corresponds to the design series, the second identifies which of the twelve Federal Reserve Banks issued the note. On $1 and $2 bills, which use an older format, a single prefix letter identifies the Federal Reserve Bank directly.12Bureau of Engraving and Printing. Serial Numbers Both serial numbers on a single bill should be identical, evenly spaced, and the same shade of green. Mismatched numbers or uneven spacing is one of the easiest tells.

What $1 and $2 Bills Lack

The $1 and $2 are the only circulating denominations with no security thread, no watermark, and no color-shifting ink.6U.S. Secret Service. Know Your Money For those two notes, you’re relying on paper feel, the quality of the intaglio printing, and the engraving detail. In practice, $1 and $2 bills are rarely counterfeited because the profit margin is too small; most counterfeiting concentrates on $20s and higher.1Board of Governors of the Federal Reserve System. Estimating the Volume of Counterfeit U.S. Currency in Circulation

Why Counterfeit Detector Pens Miss Fakes

Iodine-based detector pens react with starch, which is in ordinary wood-pulp paper but not in the cotton-linen blend of real currency. Swipe one across printer paper and you get a dark mark; swipe it across a real bill and nothing happens. As a basic screen, that sounds useful.

The problem is the most common counterfeiting method in circulation: bleaching a low-denomination bill and reprinting a higher one on the same paper. Because the paper started as a genuine note, it has no starch, and the pen test passes. The bill is still fake — wrong watermark, wrong thread position, wrong UV response — but the pen catches none of it. The feel, tilt, and light checks catch what the pen misses.

What to Do if You Think a Bill Is Fake

Stop circulating it. Knowingly passing a counterfeit, even one you received innocently, can expose you to federal charges. Handle the note as little as possible and put it in an envelope or plastic bag to preserve fingerprints.

The Secret Service directs individuals to submit suspected counterfeits to the local police department.13United States Secret Service. Counterfeit Investigations A local bank can also help confirm whether a bill is genuine. Police and banks forward confirmed counterfeits to the Secret Service, which maintains a tracking database. Write down everything you can about where and how you got the bill — the date, the location, and any description of the person who handed it to you.

Don’t expect reimbursement. Federal Reserve Banks don’t accept deposits of counterfeits, and when a bank finds one in its deposits, its account is charged for the difference.2Federal Reserve Financial Services. Handling Counterfeit Currency For an individual, a surrendered counterfeit is a total loss. That is the reason the three checks at the top of this page are worth doing before you hand money back across the counter.