Ann is an interpreter of French at the UN. Yet when she speaks to a French waiter, she has a clunky American accent a mile wide. She would never be accepted as a French interpreter.
Ann returns to the art store outside of which a man had been annoying her, after which he was questioned by a policeman. The woman in the shop tells her that the man showed ID to the policeman that showed he was a Treasury agent. Although the scene between Ann and the agent indicated that the woman could not hear what people outside said, and she was certainly too far away to see the man's ID, the scene ended with the agent and the officer talking in the store's doorway, and the woman could easily have spoken with the officer afterward.
When Skipper confesses to the police, he says he never gave anybody more than one counterfeit dollar. However, he placed a pair of counterfeit singles as change in Ann's handbag, when she gave him $5 after he only asked for $3; he possibly meant that he never passed more than one bill to a single business, presuming that Ann would use the bills separately in places he didn't frequent himself.