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 ...

The world of currency collecting has transformed dramatically over the past few years, with the collectible market valued at approximately $415 billion in recent years. While most people think of ...

A 249-year-old banknote that recently sold at auction for $15,600 has captivated currency collectors and history fans.

Paper money has long been a tool man has traded for goods and services. The importance of that money depends on the solvency of the government behind the coin or certificate. Sometimes the value of ...