What Is a CMRA?

A commercial mail receiving agency (CMRA) is a private business that accepts mail and often packages on behalf of customers who rent private mailboxes. Unlike a USPS Post Office Box, a CMRA is not a USPS retail unit—it is an independent provider that must follow USPS rules for knowing its customers.

Why people use CMRAs

Customers look for street-style addresses, multi-carrier package receiving, longer lobby hours, forwarding, or a place to separate business mail from a home address. Availability and policies vary by location.

How CMRAs relate to Form 1583

USPS requires agents to keep authorization records for the people behind each box. That paperwork is commonly Form 1583. Read our private mailbox vs PO Box guide for comparisons.

Capital Postal Mailbox is an informational site and does not operate a CMRA or rent mailboxes.