Mailbox Everyday Use: Common Questions & Answers
What happens if your mailbox is full?
A full mailbox is more than just inconvenient—it can interrupt mail delivery. USPS carriers are required to deliver mail securely inside the mailbox. If there is no space left, mail may be held at the local post office or returned to the sender as undeliverable. Regularly emptying your mailbox also helps prevent weather damage and mail theft.
Can mail carriers leave mail next to the mailbox if it’s full?
No. USPS carriers are not allowed to leave mail unsecured next to or on top of a mailbox. If the mailbox is too small, blocked, or already full, delivery is typically suspended and the mail is held at the post office. In many cases, the recipient must pick it up in person or resolve the delivery issue. Having a properly sized and accessible mailbox is therefore essential.
Who is responsible if mail cannot be delivered?
In the United States, the responsibility lies with the homeowner or resident to provide a mailbox that meets USPS requirements and is accessible at all times. If mail cannot be delivered due to a full, damaged, or inaccessible mailbox, USPS is not liable for delays or returned mail. Carriers are only required to deliver mail when safe and proper delivery conditions are met.
How many keys usually come with a mailbox?
Most high-quality locking mailboxes are supplied with two keys as standard. This ensures that a spare key is available if one is lost. For multi-unit or cluster mailboxes, the number of keys per compartment may vary depending on the system.
Can additional mailbox keys be ordered?
Yes. Additional keys can usually be ordered through the manufacturer or retailer. This often requires the lock number stamped on the key or cylinder. Some mailboxes are also designed with replaceable lock cylinders, making it possible to change the entire lock if needed.
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