The U.S. term is "meter maid." They used to all be female, I guess. But it's what we say. "Better go run and put some quarters in the meter before the meter maid gets here." Of course, that's if you've parked for too long in a legal spot. If you parkt in, say an emergency vehicle lane or a handicapped spot, or someplace else, any of the cops [police] will act on that.