The old joke was "don't take any wooden nickels."

High River RCMP may want to change that to "Don't take any Canadian $100 bills."

They're investigating after three local businesses complained of having been passed phony hundreds over the last few days.

They say local businesses and residents should be careful either using or receiving $100 bills.

They ask anyone with information to give them a call at (403) 652-2357, or to call Crime Stoppers at 1-800-222-8477 (TIPS).

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