Training Course – Security | U.S. Currency Education Program

August 1, 2025

Each denomination has several key security features, such as a 3-D Security Ribbon, a portrait watermark, color-shifting ink, and a security thread. In this section, you will learn about the security features found in different denominations of U.S. currency.

https://www.uscurrency.gov/educational-materials/training-course/security

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