Answer
Jul 21, 2026 - 01:01 PM
A USPS approved mailbox lock is a lock that meets the specifications set by the United States Postal Service for securing mailboxes, particularly cluster box units (CBUs) and other centralized mail delivery systems. These locks are typically provided and installed by the USPS, ensuring that only authorized postal employees and the mailbox owner can access the mail. Using non-approved locks may prevent mail delivery or violate USPS regulations.
