I agree with junerose. Showing up at the parked car with the permit in hand should be reason enough to stop writing the ticket. It is not the same as trying to get out of paying a meter because you were "just going to be a minute" because a) It is reasonable to expect that someone leave their car mainly for the purpose of retrieving the permit, and b) Chances are, if the person has a guest permit to present, they were probably going to use it anyway, unlike a quarter, where it's obvious that the person is only now trying to pay because they're getting a ticket. If you have access to a guest permit, there really isn't any reason you wouldn't use it every time.