Learning to spot the most valuable 10-dollar bills means knowing what makes them worth so much. We're talking super old currency, special serial numbers, interesting mistakes in printing ...

If you have a pre-1913 2-dollar bill in uncirculated condition, it is worth at least $500. Even in circulated condition, ...

Assistant manager Sam told Newsweek it's a "digital world," but he had to speak "sternly" to the teens about their mistake.