As paper money replaced coins, the practice continued. Merchants began marking bills with ink stamps to show they had inspected and accepted the currency.
During the global spread of the U.S. dollar, these marks appeared in many countries. Each symbol represented a merchant or exchange point, acting like a signature of trust.
Today, such markings still appear occasionally. They rarely affect value and can even interest collectors, offering a glimpse into the journey and history of a single bill.
