How to change out a mailbox lock

How to Open Mail Box with Key 2p locked mailbox with slot Through The Door Drop Box, x x 6 Mail Slots for Doors, Adjustable Chute Door Mail Slot with Code Lock, Suitable for Door Thickness ” to ” locked mailboxes with slot tl;dr: Adding a lock yourself may not be legal, but you can buy a USPS-approved mailbox with a lock The box will need a mail slot or similar,

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