The Curious Mark Found on Some U.S. Bills—What Does It Mean?
Finding an unfamiliar stamp on a U.S. dollar bill can raise an obvious question: why would someone deliberately mark genuine currency? Small ink symbols, initials, characters, geometric designs, and other markings are sometimes found on U.S. notes that have circulated through currency-exchange networks. Collectors and currency enthusiasts commonly refer to many of these markings as … Read more