Post office box
A post office box or PO box is a rentable, lockable box that is located at a post office, registered under a unique address that is used to receive mail.
Only post office workers and the person or organization renting the box from the post office can get into the PO box.
Post Office Box Media
An American post office box full of mail
PO boxes of various sizes in a German post office, with their number range and postcodes written above them
Post office boxes next to the S-market supermarket in Klaukkala, Finland
Outdoor Post Office Boxes (as common in Switzerland) numbers one to six at 9054 Haslen, Switzerland
PO boxes in the lobby of a U.S. post office
Post office boxes in General Post Office, Hong Kong
PO boxes at the historic U.S. Post Office in downtown Chico, California
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