A discovery of counterfeit bills is sparking a warning from the OPP.

Officers are warning retailers and shoppers to check your bills, especially if it’s American currency. The OPP was called when a business in Orillia was paid using fake 100 and 20 US dollar bills. Police say retailers need to be cautious when someone pays in large American currency.

If you have any information on this counterfeit money scam you’re asked to call police or leave an anonymous tip with Crime Stoppers.