There is no single, best way to identify counterfeit currency. However, these guidelines may help to identify some of the more common features of counterfeit notes. If possible, examine several genuine notes and compare their features to those on the suspected counterfeit note. If you ever doubt the authenticity of a note you receive, contact your local United States Secret Service office. (Off-site Link)
Additional information about U.S. currency and dealing with counterfeit currency can be found at the U.S. Secret Service Web site. (Off-site Link)
Additional information about the new security features found in the Series 1996 $20, $50 and $100 notes; and the 1999 Series $5 and $10 notes can be found at the U.S. Bureau of Engraving and Printing Web site. (Off-site Link)
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