# Post Office Box A post office box is a durable mailing endpoint administered by a postal operator. PDF pages 41–46 of [[Scanned_20260803-1201]] preserve the rental, payment, key, and location records for USPS PO Box 6412 in ZIP 78209. ## Continuity role The box functions as an identity and correspondence anchor independent of short-term residence. A receipt establishes rental activity, not the contents or sender history of the box.