What a CMRA Is, and Why It Decides Almost Everything Else

If you have ever wondered why one mailbox store will happily sign for a FedEx delivery and the post office two blocks away will not, or why a bank looked at your perfectly ordinary street address and said no, the answer is almost always the same three letters: CMRA.

A commercial mail receiving agency is a private business that the Postal Service has authorised to receive mail on behalf of other people. That is the whole definition. It is not a licence, it is not a franchise, and it does not mean the business is inspected or graded. It means the store has filed the right form with the local post office, agreed to a set of obligations, and been added to a list.

What the designation actually does

Three things follow from it, and they are the three things that matter.

The store can accept your mail. Ordinarily, a carrier delivers mail addressed to a person at an address where that person is known to live or work. A CMRA is the exception: the carrier delivers a sack of mail addressed to dozens of different people at one commercial address, and the store sorts it into boxes. Without the designation, that arrangement is not supposed to happen.

You get a street address rather than a box number. This is the part people are usually buying. A private mailbox at a CMRA has an address that looks like 1234 Commerce Street PMB 218, which is a street address with a box designator on it. A PO Box does not look like that, and a long list of forms, applications and delivery systems refuse to accept anything that says "PO Box".

Somebody is there to sign. UPS and FedEx will not deliver to a PO Box at all, because a PO Box is inside a postal facility and those carriers have no access to it. They will deliver to a CMRA, because a CMRA is a shop with a person behind the counter who can sign for the parcel and put it on a shelf. For anyone who orders anything, this is frequently the entire reason to rent a box.

Why the paperwork exists

The obligations that come with the designation are set out in the Postal Service's own rulebook, the Domestic Mail Manual, section 508, which covers recipient services and, in the part everyone ends up reading, mail delivered through an agent. The underlying regulation sits in 39 CFR 111, which is what gives the manual force.

The headline obligation is identification. A CMRA has to collect a completed PS Form 1583 from every customer, has to witness the signature, and has to see two forms of identification, one of which carries a photograph. It has to keep that record for as long as you have the box and for a period afterwards, and it has to hand the record over if the Postal Inspection Service asks for it.

This is not the store being difficult. A store that skips it risks losing the designation, which would end its mailbox business overnight. If somebody at a counter tells you they cannot release a box today because your second ID shows an old address, they are not inventing an obstacle.

The obligations that catch customers out

A few of the rules have consequences that nobody mentions at signup.

• Only listed names get mail. If a piece of mail arrives addressed to a name that is not on your Form 1583, the store is supposed to refuse it. This is why adding a business name, a spouse or a trading name is a form update rather than a favour.
• Closing the box does not forward your mail. When a CMRA customer leaves, mail arriving afterwards is endorsed and returned to sender unless you have made a separate arrangement with the store. The Postal Service's own change of address system does not cover the move out of a private mailbox in the way people expect.
• The address is identifiable as a CMRA. Postal address databases flag these addresses. Anyone who runs your address through address validation, which includes most banks, most insurers and a good number of state agencies, can see what it is. That is the mechanism behind almost every "we cannot accept this address" letter.

Not every mailbox store is one

Here is the practical point. The words on the sign tell you nothing. A store called Something Mail Center might not hold the designation, and a print shop with no mail wording in its name might. There is no reliable way to tell from the outside, and there is no public directory that stays current.

So ask. The question that gets a straight answer is: "Are you a CMRA, and will you sign for UPS and FedEx deliveries addressed to my box?" Anyone who rents mailboxes for a living will know exactly what you mean. If the answer is vague, the answer is no.

Where this leaves you

For most people, the CMRA question resolves the choice between a PO Box and a private mailbox in about ten seconds. If you order things, or need an address that passes as residential-looking on a form, or need somebody to sign, you need a CMRA. If you just want somewhere safe for letters and you are happy with "PO Box" on the line, the post office is cheaper and always will be.

The interesting cases are the ones in between, and those come down to price and to how often you can physically get to the counter. That is what the cost comparison tool is for. The related question of what happens when a bank looks at your new address is covered separately in why banks reject CMRA addresses.

Background reading, if you want the history of how these businesses came to be regulated the way they are, is reasonably well covered on Wikipedia's page on commercial mail receiving agencies.