Sending to PO Boxes
Getting Started
This article explains whether you can send Certified Mail to a PO Box address using OnlineCertifiedMail.com and what happens during delivery. It helps you understand how USPS handles certified letters when there isn’t someone physically at the box to sign.
In This Article
Can You Send Certified Mail to a PO Box
Yes — you can send Certified Mail to a PO Box address. Even though a PO Box doesn’t have someone physically there to receive and sign for the mail, USPS will still process it for delivery to that address.
How Delivery Works
Because the USPS can’t obtain a signature inside a locked PO Box, the carrier typically:
- Leaves a notice in the PO Box indicating that Certified Mail has arrived.
- The notice instructs the PO Box holder to go to the post office service desk to sign for the item.
At the counter, the recipient (or their authorized agent) presents the notice and signs for the mail to complete delivery. The signature file will then be available in your account for reference.