Serial Numbers
Understanding the structure, printing, and identification of serial numbers on U.S. currency.
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What Are Serial Numbers?
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Learn the structure of serial numbers on U.S. paper money, how district letters work, and why they matter to collectors.
Read →How Serial Numbers Are Printed
Explore the Bureau of Engraving and Printing process for applying serial numbers to currency.
Read →Reading Serial Numbers and District Identification
Learn how to determine which Federal Reserve Bank issued a note from its serial number.
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