You've probably spent hundreds of dollars without giving them a second thought. Maybe you've folded that crisp blue Benjamin for your wallet or handed it over for groceries without even glancing at ...

If you’ve ever read the eight-digit serial number on a dollar bill, it was probably to play liar’s poker—or out of sheer boredom. But those digits are more than a passing diversion to a thriving ...

Although most of your paper money won’t be worth more than what it says, there’s a chance it might — even if it’s not decades old — based on the serial number. To find the value, or find out if your ...

Pull any bill out of your wallet. See the dark green numbers on the top-left and top-right corners? Those are serial numbers, and some are more rare than others. If you happen to have paper money with ...