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.