A reference for US currency, kept current
DollarBill.net is an editorial reference for collectors, students, business owners, and international visitors who want clear answers about US paper money. Guides cover portraits, design history, security features, authentication tips, and the kinds of factors that move a bill above face value with collectors.
New to the site? Start with the $1 bill for the basics, jump to the $100 bill for the most advanced security features, or open the FAQ for quick answers.
Beyond the individual denominations, the guide index collects everything else: how to read a serial number and check it with the serial number checker, what star notes are, how to spot a counterfeit, what silver certificates are worth, how notes are graded, the history of US paper money, the mutilated currency redemption process, and a beginner's guide to collecting.
Last reviewed on July 25, 2026.