It's one of the oldest crimes in history, and its on the rise here in Medford.
With three busts in the last 30 days, police are offering tips on identifying funny money.
Sergeant DJ Graham says that people should be aware of both the texture of their money and the security features involved.
"Look at that bill, feel the bill, compare it to other cash you might have. Look for the security strip in the bill."
If you are unsure about any money you have. you can go to the know-your-money website.