Contact the landlord, property manager, or postal service for a replacement key
Check whether the mailbox uses a standard lock that can be rekeyed by a locksmith
Use the mailbox’s official key replacement process if it is a community or USPS-managed mailbox
Visit a locksmith with proof of ownership or authorization
If the lock is damaged, have the lock replaced by an authorized professional
If you are locked out of a shared mailbox, request access through the building manager or HOA
If the mailbox is a USPS mailbox, contact the local post office for guidance on obtaining access
Keep a spare key in a secure place after the issue is resolved