Police on Vancouver Island are warning people to keep a close eye on their cash.
Counterfeit $100 bills have been popping up all over western Canada since June 1, said Const. Gary O'Brien, Nanaimo RCMP spokesman.
He said there are also fake $20's and $10's floating around and all the bills bear the same serial number.
There have been 14 instances of counterfeit bills showing up in Nanaimo since June.
"We're still trying to get a handle on who's responsible," O'Brien said. "All we're getting is the bottom feeders that are being offered $20 to go cash $100."
He said businesses must be extremely careful about checking bills to make sure they are genuine.