An NYPD officer was arrested for allegedly stealing a fellow cop's credit card after just three days on patrol and going on a shopping spree, authorities say.

Josanne Hernandez, 27, allegedly charged nearly $3,500 to her colleague's card during a spending bender that included a trip to Target in Fort Greene, where Hernandez was assigned, and online purchases at Nordstrom's and Bloomingdale's, among other stores.

According to the Daily News, which first reported the arrest, Hernandez was appointed to the NYPD in January and began uniformed patrol in the 84th Precinct Oct. 11. Three days later, she allegedly stole the officer's American Express card at the Police Academy in College Point.

Court records indicate Hernandez was seen on video at a Walgreens in Bedford-Stuyvesant where the stolen American Express card was used; the cop she allegedly stole from also identified the thief as a fellow officer, police say.

Hernandez was charged with petty larceny and possession of stolen property. She has since resigned from the NYPD.

Information on an attorney for her wasn't immediately available.