I've had to drop off a couple of boxes (on two different occasions) of textbooks to ship back to the rental place. Both times I waltzed in and handed the boxes to the person behind the counter (well, once I had to wait for a phone call to end, but it was a work call and she was the only one in the place, so no biggie). I got my drop-off receipt (with tracking numbers so I can, you know, track it) and was out the door.