Believe it or not, the agency responsible for protecting U.S. currency is the United States Secret Service. The agency was founded on July 5, 1865, as part of the Department of the Treasury to combat the widespread counterfeiting of currency happening at the end of the Civil War.1
Combating counterfeiting remains core to preserving the integrity of the nation’s money.
The advent of high-tech printers and inks continues to raise the bar on what the federal government needs to do to limit counterfeiting, leading to a range of new strategies.
To make U.S. paper currency more difficult to copy, there have been continual changes to the artwork, paper, and ink. Summarized below are some of these recent changes.2
Portrait - The portrait has become much more sophisticated by becoming closer to a lifelike picture than the screen-like background it was previously. On counterfeit bills, the portraits often appear to be unclear or unnaturally white.
Border - The border design is now composed of intricate, crisscrossing lines that are clear and unbroken, distinguishing them from the smudged or broken lines of counterfeit bills.
Paper - The paper is now embedded with tiny red and blue fibers. A polyester thread is also woven inside $10, $20, $50, and $100 bills with “USA TEN, USA TWENTY” printed on them to match the denomination. This makes it nearly impossible for photocopiers to reproduce.
Ink - The ink used is a special, “never-dry” ink that can be rubbed off. This is not foolproof, however, since ink on some counterfeit bills can be rubbed off as well.
Microprinting - Surrounding the portrait are the words “The United States of America” in miniature letters. It appears to be a black line to the naked eye, and is how a photocopier would reproduce it.
Keep in mind that you are not reimbursed for any counterfeit currency that may come into your possession. So you are advised to be careful about the large bills you accept for payment.
1. SecretService.gov, 2023
2. USCurrency.gov, 2023
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