Ridgefield police have reported two incidents involving fake $100 bills that were used at local businesses.
"Please be aware of counterfeit money," the police said in a release.
"There are counterfeit pens that you can purchase that will turn black if the bill is fake."
Police say business owners should contact Ridgefield Capt. Jeff Kreitz at 203-438-6531 if they see any fake money.
"Please make your staff aware," the release said.