Mounting of boxes Post-office box

po boxes in lobby of u.s. post office

post office boxes mounted in wall of post office, either external wall or wall in lobby, staff on inside may deposit mail in box, while key holder (some older post office boxes use combination dial open box instead of key) in lobby or on outside of building may open or box retrieve mail.

lobby open hours

in many post offices in u.s., po box lobby separate window-service lobby, former may kept open around clock while latter locked after business hours. however, in u.s. since 1980s, in cities , large urban areas, post offices have tended close box lobbies overnight because of tendency of homeless people use them sleeping quarters. result, box lobbies accessible after-hours customers provided code door keypad. in addition, post offices located in rented facilities such shopping malls. result, po boxes can accessed while facility open.