PARK CITY — A Salt Lake County couple was arrested here Saturday evening after they tried to pay for merchandise using counterfeit money.

The couple had at least seven counterfeit $100 bills in their possession at the time of their arrest, according to Summit County Sheriff's Sgt. John Lange. They made the false money by washing the ink from $1 bills, then reprinting $100 markings on the paper.

The "washing" counterfeit process is complicated but difficult to detect and therefor popular among criminals, Lange said.

Police believe the couple had used the bills to illegally purchase items in at least four Park City shops. During the arrest, police recovered a large amount of stolen property, Lange said.

The pair's illegal activities came to light when a clerk at the Tanger outlet mall noticed problems with the cash, Lange said.

Both adults are in their mid-30s, Lange said. They have been booked into the Summit County Jail on investigation of multiple felony charges, Lange said.