Can I send Certified Mail to a PO Box?

You can to send certified mail to a PO Box. Upon arrival at the post office, the recipient will find a notification inside their PO Box that instructs them there is a certified letter and also how to get it.

If a signature is required for the certified mail, the recipient will receive a specific delivery slip (PS Form 3849) and must:

1. Present the delivery slip to the post office window clerk.
2. Either sign the USPS Green Card, which is returned to the sender by First-Class Mail, OR
3. Sign electronically, which generates a Return Receipt (Electronic) for the sender.

USPS handles certified mail sent to a PO Box with the same level of security as any other mail. This process helps prevent mail fraud and ensures your important letter reaches its intended recipient.