The Coupeville Marshal’s Office is warning island businesses that it has taken two reports on counterfeit $10 bills being passed in the Coupeville area in the past month.

Both passed bills, though clearly fraudulent, could easily be mistaken for legitimate bills when receiving payment or distributing change, said Town Marshal Lance Davenport in an email to businesses.

Anyone who suspects handling a counterfeit bill should call 911 immediately to report the transaction to police, Davenport said. “If possible, and safe to do so, please try to keep the person who passed the bill on location until we respond. In the vast majority of cases, the person passing the bill is an unwitting victim as well, and it may help law enforcement to locate the source.”