Perhaps the customer doesn't even notice
Customer: I'll take it
Salesman: ok, we will take it to get it ready, oh and there's a slight mis alignment with the bumper, we will go ahead and fix that for you right now, it shouldn't be long.
Paperwork is filled out while the fix is done. No harm, no foul
right? Dealer made it right and the customer is happy. not everyone is a prickly bastard customer.