Learn to authenticate your money
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Older Designs Can Still Be Used
All designs of U.S. currency remain legal tender, regardless of when they were issued.
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Training Resources
Learn how to authenticate with online training resources like industry-specific toolkits and a self-paced online training course.
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Cash Assist Mobile App
Use your phone to quickly locate and understand the security features of cash.
Noteworthy: Top 3 Ways to Authenticate Cash
Noteworthy Podcast: Older Designs of U.S. Currency
Recent Updates
Take a closer look at our newest content
Order Materials
Order resources about U.S. currency to support training, education, and consumer protection initiatives – all materials and shipping are free.
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Celebrating Women’s History Month
For the first time in history, two women’s signatures appear on Federal Reserve notes. Chief Lynn Malerba and Janet Yellen’s signatures are on Series 2021 $1 and $5 bills.
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Green Money Podcast
Listen in on conversations about the history, use, and designs of Federal Reserve notes.
Learn more currency facts
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Green Money Podcast
Our Apps
Money Adventure
Money Adventure is a fun, interactive smartphone and tablet app that helps students learn about the security and design features of Federal Reserve notes.
Cash Assist
With Cash Assist's suite of tools, you can learn to quickly locate and understand the security features of the cash in your hands. Use your phone's camera, accelerometer, and more to help you make decisions.
Report a Counterfeit
Learn about the recent changes to the counterfeit reporting process.
Learn how to report a counterfeit
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Did you know?
It would take 4,000 double folds, forwards and backwards to tear a banknote.
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Did you know?
Want to measure your notes in a different way? A stack of currency one mile high would contain more than 14.5 million banknotes.
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Did you know?
No matter the denomination, a banknote weights approximately 1 gram. Because there are 454 grams in one pound, this means there are 454 notes in one pound of currency.
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