I went in to drop off a letter very late in the day so I could save the postage and even just maybe talk to someone briefly. The waiting room had 15-20 people waiting for service. It was 30 minutes from closing. A sign said do not approach the service window and to just take a number. I approached the security guard and asked if I could just drop a letter off. He said no, I have to wait in line! There did not appear to be a letter slot anywhere. I had to go home and Mail the letter later. That sure made a lot of sense!