Investigators say several incidents of people passing counterfeit money have been reported, including one transaction at Flash Foods on E. Jackson Street.
Now, they say residents and merchants should be alert for money that doesn't feel or look real.
Customers say it is a problem that needs to be fought.
"I understand it's a problem for store owners and consumers are having their money marked... it's a problem all the way around and it needs to be taken care of," says resident Jimbo Smith.
Thomasville Police say counterfeit bills have been found in varying amounts from $1-$50. They say suspicious-looking bills should be turned over to them.
According to federal law, anyone caught trying pass fake money faces jail time.