GUILDERLAND — A counterfeit case has been resolved this week by the district attorney’s Financial Crimes Unit.

Talib Parker, 28, of Troy, pleaded guilty to first-degree criminal possession of a forged instrument, a felony, before Judge Peter A. Lynch in Albany County Court on March 31, according to a release from the district attorney’s office.

Between Nov. 1, 2013, and April 10, 2014, Parker used counterfeit $50 bills at various retail stores to purchase high-end electronic equipment, and then returned the electronics in exchange for real United States currency, said the release.

The thefts were uncovered by the Bethlehem Police Department, and the case was investigated with assistance from the Guilderland Police Department, New York State Police, Albany County District Attorney’s Office’s Financial Crimes Unit, and the United States Secret Service.

District Attorney David Soares urges all retailers and consumers to be alert for counterfeit currency, including checks, cash, and credit cards, the release said. Consumers should also routinely check financial statements for accuracy. Those who suspect illegal counterfeit activity are urged to contact police immediately.