On bills worth $5 and up, each serial number begins with a letter, which tells us the series year of the bill. (On dollar bills and $2 bills, the series year only appears in the bottom right ...
Newer bills can also be valuable, though. Some 5-dollar bills from recent years can be worth a lot if they have early serial ...
If it's a newer bill, look for the watermark. Which 20-Dollar Bill Serial Numbers Are Worth the Most? Serial numbers are a ...