It is generally not a service provided by the post office to replace mailbox keys.
The post office is responsible for delivering mail to your mailbox, but they are not responsible for the maintenance or security of your mailbox.
Therefore, it is recommended that you contact a professional locksmith for mailbox key replacement services. A locksmith will have the expertise and tools needed to replace your mailbox key safely and efficiently, ensuring the security of your mailbox and the confidentiality of your mail.
The cost of replacing a mailbox lock can vary depending on several factors, including the type of lock, the level of security you require, and the location of your mailbox. On average, the cost of replacing a mailbox lock can range from $125 to $300