Some Central Kentucky business owners are double checking their cash registers tonight, making sure they don't have any funny money.
Frankfort Police say they've found several fake $100 bills in recent weeks.
Five of them were actually used to bail out a prisoner at the Franklin County Regional Jail.
The clerks there didn't realize the bills were counterfeit until it was too late.
Police are still trying to find that prisoner.
Business owners around the area have also reporting getting fake bills as well.
Police say they don't know where the bills were printed, or who is responsible.
Producing counterfeit money is a federal felony.