KALAMAZOO, MI -- Fake bills are circulating in Kalamazoo.

On Saturday Sept. 10, Kalamazoo Public Safety Officers investigated four separate cases where counterfeit money was passed. The denominations included $100 and $20 bills.

The suspects passing the bills might take additional steps to distract victims during the transaction, police said. The bills are of a high quality and can easily be mistaken as real, however police said the key is to look for a "for motion picture use only" notice printed on each bill.

No suspects have been identified at this time and the cases remain under investigation.

Kalamazoo Public Safety encourages businesses and private persons to exercise caution in accepting denominations greater than $20 and to look for the notice. To learn how to authenticate your money visit uscurrency.gov to explore the security features found in U.S. currency.

Anyone having information regarding this incident is asked to contact the Kalamazoo Department of Public Safety at (269) 337-8139 or Silent Observer at (269) 343-2100.