The Lansing Police Department is investigating a counterfeit bill that was used at the CATA bus station.
A cashier at the CATA station called police around 9 a.m Thursday after a woman tried to buy a bus ticket with a fake $20 bill.
The woman told police she was given the bill as change at a store, and didn't realize it was fake. She was not arrested.
Detectives are now working to track down the bills' origin.
FOX 47 News will keep you updated on the investigation.