If you see a bill with Benjamin Franklin's picture on it, you may want to ensure it is real.

The Middlesex County OPP say people have been trying to use — and in some cases successfully using — fake U.S. $100 bills near London, Ont., lately.

According to police, this happened on a handful of occasions in Middlesex Centre between Wednesday and Friday of last week.

Those incidents followed the seizure of two of these fake bills from a pair of commercial businesses in Thames Centre on Feb. 4. In these prior cases, a 17-year-old male from London was arrested and charged with two counts of uttering counterfeit money.

No arrests have been made in the more recent cases, which remain under investigation.