What does a CMRA address mean?

It means a business at that address accepts mail on behalf of other people as a service, which is how USPS defines the category, and that the status is recorded against the address in USPS data. The label describes the mail service at the location, not the quality of the address or the legitimacy of the company using it. On an application it signals that mail arriving there is handled by an intermediary, so a reviewer may ask for the service agreement and the Form 1583 behind it.

What is the difference between a virtual address and a CMRA?

A virtual address is a commercial product. CMRA is what USPS calls the service of accepting mail for other people, and USPS address data carries a flag for addresses it records as CMRAs, so the two answer different questions even though they often overlap. Most mailbox-style virtual addresses carry the flag, because forwarding other people's mail is the service being sold. A virtual office running out of a working commercial building may or may not, and because the record attaches to the delivery point rather than to the brand, the only reliable way to know is to check the exact street address and suite.

Is there a free CMRA lookup now that the USPS Web Tools API is retired?

Yes. Third-party tools that license USPS-certified data still expose the CMRA flag and the RDI classification. The save office address checker is one free option. It runs the same CMRA check the USPS Web Tools API used to expose and gives the result a grade from A to F.

Do banks read the CMRA flag when they review an address?

Not every bank publishes an address rule at all, but several publish exclusions that a CMRA address runs into. Mercury's list for a company's physical address names a commercial mail receiving agency directly, and a separate Mercury page on legal addresses, which rules out P.O. boxes and virtual offices, says it is unable to make exceptions. Relay says an operating address cannot be a PO Box, a virtual mailbox, or a mailbox rental service. Bluevine's application guide says it cannot accept P.O. box or mail service addresses for the business address, and its page on required documents adds registered agent addresses; neither page uses the term CMRA or defines mail service. What none of them publishes is a decision that turns on the USPS flag by itself, which is why the companion guide to non-CMRA addresses argues that clearing the flag is usually not the fix people expect.

Is a UPS Store address a CMRA?

Two questions are hiding in that one. USPS defines a commercial mail receiving agency by the service, a business that accepts delivery of mail on behalf of someone else as a business service, so a UPS Store mailbox meets the definition. Whether a given location is currently listed in the USPS registration database is a separate fact we cannot verify from outside, and The UPS Store itself hedges with the phrase participating locations. What we can point to is the store's own FAQ, which says your address carries PMB or the pound sign and that PS Form 1583 is mandatory. USPS asks both of those only of a commercial mail receiving agency. What makes such an address weak for banking is not the flag itself but the place: a mail counter is not somewhere a business is run from, and that is what a bank is trying to establish. A working office building can carry the same flag and read very differently.

What does CMRA stand for?

Commercial Mail Receiving Agency. USPS uses the term for a business that, in whole or in part, accepts mail on behalf of other people or companies as a business service, and it counts office business centers as CMRAs too. Every CMRA has to register with the Post Office, and USPS address data carries a flag for addresses it records as CMRAs. Whether a particular address is recorded that way in USPS data is a separate question, and that is what a lookup answers.

Is a CMRA address the same as a P.O. box?

No. A P.O. box is rented from the Postal Service itself, usually in a Post Office lobby, and USPS's addressing standard says 'Only the Postal Service is entitled to provide delivery to a PO Box.' A CMRA mailbox is rented from a private business at that business's own address, usually its street address, and USPS rules have the customer's address carry PMB (private mailbox) or the alternative # sign. A # on its own does not tell you which one you are looking at, because some Post Offices let box holders write the Post Office street address with # before the box number. Form SS-4 rules out a P.O. box only on lines 5a and 5b, which ask for 'the entity's physical address,' and its instructions do not mention CMRAs. Account providers name the two separately: Mercury lists a P.O. box and a commercial mail receiving agency as two items and turns both away for a company's physical address, the place where the team works day to day.

How do you get a CMRA address?

You rent a mailbox or virtual address from a business that receives mail as a service. USPS rules then require a PS Form 1583, Application for Delivery of Mail Through Agent, for each customer, and if none is on file the operator has to send the mail back to the Post Office. You show two forms of ID: a photo ID and a second document that confirms the address you list on the form. Utility bills no longer qualify. You sign in front of the operator or a notary commissioned in the United States, in person or over live video. The operator keeps a copy and enters the form, with images of your IDs, into a USPS database called the CMRA Customer Registration Database, under a rule in effect since July 1, 2023. The address you then use carries a PMB (private mailbox) or # designation.

CMRA Address Meaning: What It Is and How to Check Any Address Free

Short answer

A CMRA address is the street address of a Commercial Mail Receiving Agency, which USPS defines as a business that accepts delivery of mail on behalf of another person or entity as a business service. Address checks in onboarding and filing workflows can surface that flag. What it signals on an application depends on how the flag pairs with the separate residential or commercial classification, which produces four different address types.

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Key takeaways

USPS defines a Commercial Mail Receiving Agency by the service it provides: a business that accepts delivery of mail on behalf of another person or entity. USPS records the status as a flag on the address itself. Registration with the local Post Office follows from that definition rather than creating it.
The USPS Web Tools API that powered most free CMRA checkers retired on January 25, 2026, leaving third-party tools as the primary way to verify the commercial mail receiving classification.
Banks publish address exclusions written against types of mail service rather than against the USPS flag itself. For that reason, checking the flag tells you how an address is recorded, not whether a given provider will accept it.
The CMRA flag attaches to the specific delivery point, not to the provider's brand; switching providers at the same address does not change it.

Who this is for

Founders whose bank or payment processor onboarding stalled and pointed at the address.
Operators evaluating a virtual office building before signing up who want to see how the address is recorded in USPS data.

A CMRA address is a street address where a business receives mail for other people as a service, and USPS records that as a flag on the address itself. Address checks in onboarding and filing workflows can surface that flag. Here is what it does and does not decide.

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What Is a CMRA Address?

USPS defines the category in the Domestic Mail Manual at section 508.1.8.1, and the definition turns on the service being sold rather than the type of building. The manual's words are: a business that, in whole or in part, accepts the delivery of U.S. Mail on behalf of another person or entity as a business service. A storefront mailbox counter meets that. So does an office business center, which the same section names explicitly and treats as a CMRA for postal purposes.

Registration follows from that definition rather than creating it. An operator that meets the description has to register with the Post Office responsible for delivery, and the manual then requires it to represent the customer's delivery address with a private mailbox (PMB) designation or the alternative pound sign. That labeling rule is why a CMRA address is often recognizable on sight, and why some systems that parse addresses treat PMB as a category of its own. One further distinction matters when you read a lookup result: the definition describes a service, while the flag is a record of it. An address can meet the definition without USPS having recorded it, so a negative result tells you what the data says rather than what the building does.

USPS registers operators, it does not certify addresses

USPS registers mail-receiving operators. It does not certify addresses, and the CMRA rules in section 508 have no category of certified address, so a provider that advertises one is describing something those rules do not define. Treat the claim as a reason to check the underlying record yourself.

The flag is also not the same thing as the commercial or residential classification, which USPS records in a separate field called the Residential Delivery Indicator (RDI). An address can carry the CMRA flag or not, and be classified commercial or residential, which is four combinations in total. Reading only one of the two fields is where most of the confusion about CMRA addresses starts. The sections below take the fields first, then each of the four combinations in turn.

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What CMRA Status Does and Does Not Decide

Two USPS fields do most of the work when an address is checked. The CMRA flag records whether mail at that address is received on behalf of others as a service. The RDI records whether USPS classifies the address as residential or commercial. Address verification products expose both, which is why they surface in onboarding and filing workflows.

Those two fields together create four possible address types. How each type fares at a bank, a state filing office, or the IRS depends on that institution's own rule.

What these providers actually publish

The published rules are narrower than the folklore, so it is worth being exact. Mercury's rules for a company's physical address, the place where the team works day to day, exclude a P.O. box, virtual address, commercial mail receiving agency, mail center, or registered agent address. Relay bars a virtual mailbox or mailbox rental service as an operating address, and in July 2026 the strings commercial mail receiving and CMRA appeared nowhere in its help center. Bluevine names P.O. boxes and registered agent addresses for the business's physical location, and its application guide adds mail service addresses. On the pages we read, none of them says it queries the CMRA field in USPS address data, and none offers to reconsider based on what that lookup returns. What the rules actually exclude works through these rule sets and Brex's.

What Changed When USPS Retired Its Free Address Lookup

The USPS Web Tools API ran for more than two decades as the default free endpoint for address validation, CMRA lookup, and RDI classification. On January 25, 2026, USPS retired it and moved users to a new API with tighter default limits and restrictions on bulk or automated list-based validation, which made free, high-volume address checks impractical for the use cases founders, landlords, and small businesses actually relied on.

That left a gap for anyone checking an address quickly, such as seeing how a virtual office address is recorded before it goes on a bank application, or verifying that a potential home office address is classified as residential. Commercial vendors still license the same CASS-certified (Coding Accuracy Support System) USPS data, including the CMRA flag and the RDI field, and route it through their own APIs.

The underlying data is still USPS

Any reputable CMRA lookup running after January 2026 is pulling the same USPS-certified records the old Web Tools API exposed. What changed is the interface and the rate limit, not the source of truth.

The Four Address Types, Explained

Every US street address falls into one of four buckets once you combine the CMRA flag with the RDI classification. The bank column below describes a general pattern. How an address fares at a given bank still depends on that bank's own rule.

Address type	Typical example	Bank acceptance (general pattern)	Public-record risk
Non-CMRA, commercial	A real office in a commercial building, a business park, some virtual offices	Highest, though providers that exclude virtual addresses by category still exclude those	Low
CMRA, commercial	Two very different places land here: a UPS Store or mailbox-network counter, and a working office building that also receives mail for tenants	Depends on which of the two it is, so banks look past the flag at the building	Low
CMRA, residential	A mail-receiving location in a residentially classified area	Mixed, and the residential classification is its own friction point	Low
Non-CMRA, residential	A home address, an apartment	High for sole proprietors, lower for LLCs	High, your home shows on state filings

How CMRA status and RDI classification combine into four address types.

The grade a verification tool assigns is a readable label on top of this combination, and it is only ever as good as the data behind it. USPS records the flag and the classification, but it does not record whether a building has staff in it, so no tool can tell a mail counter apart from an office suite that happens to accept mail. That distinction is the one a bank ends up making, which is why the flag is a starting point for the question rather than the answer to it.

How UPS Store, Mailbox Networks, and Virtual Offices Score Differently

Mailbox-style services look almost identical from the outside, but the USPS data behind each one can differ sharply. Here is how the most common options tend to land.

UPS Store: meets the USPS definition of a commercial mail receiving agency, typically classified as commercial. It can work for mailing, and some bank rules exclude mailbox services by name.
Generic CMRA mailbox networks: almost always CMRA-flagged, usually commercial. Useful for forwarding, less reliable for bank onboarding without supporting documents.
Executive suites and serviced office providers: some locations are CMRA-flagged, others are not, depending on how the building registered with USPS. Always check the specific address, not the brand.
Virtual office providers: varies provider by provider. Some operate out of real commercial buildings, others out of mailbox-style suites. The flag depends on how USPS registered each specific building, so always run the exact street address before you commit.
Home address: not CMRA, but residential. Works for many banks and LLC filings, at the cost of publishing your home address on state records.

The brand does not decide the flag, the location does

Two virtual offices from the same provider can land on opposite sides of the CMRA flag depending on the building and how USPS registered that specific suite. Run the exact street address before you assume.

The flag alone is not a verdict on the provider, because CMRA status and the commercial classification are two separate fields, and an address can carry one without the other. A mail store is CMRA-registered and mail-only. A virtual office run out of a real commercial office building can be CMRA-registered and still classify as commercial, because the two fields are recorded independently. Some office-building addresses do not carry the flag at all, which is why one provider's addresses can fall on both sides. USPS defines a CMRA by the mail-receiving service being provided rather than by the type of building, and DMM 508.1.8.1 counts an office business center as a CMRA, so an office setting does not by itself clear the flag.

The refund test: does the provider stand behind its address?

There is a faster way to judge a provider than reading its marketing copy: check whether it publishes a money-back guarantee for address rejections, and read the conditions on it. save office, for example, refunds 100% of the subscription fees for an address if a government agency or financial institution denies your business registration or bank account application because of that address, provided you email the written denial letter within 30 days of the denial (the full conditions are in the terms, section 6.4). Whichever provider you choose, a guarantee like that is worth looking for, because it moves the verification risk from you to the operator.

Verification beats trust here, and you can run it on any provider, including this one. Every save office address we have checked is classified commercial in USPS data. Two of them, in San Francisco and Washington DC, carry the CMRA flag, and we say so rather than hide it. Paste any address you are considering into the free address checker and read the classification for yourself before you commit.

What Banks, the IRS, and LLC Filings Do With a CMRA Flag

Where these systems publish an address rule, the rule names kinds of addresses and mail services. Knowing which rule applies to you tells you whether a CMRA result matters.

System	What the published rule says	What to prepare
Mercury and Relay (business banking providers)	Published policies exclude virtual addresses and mailbox services from the field that shows where the business operates: Mercury's physical address and Relay's operating address. Mercury's separate legal address page says that it is unable to make exceptions for P.O. boxes and virtual offices. Neither publishes a rule that turns on the USPS flag by itself. Check each provider's current address policy before applying, since these are the terms they publish rather than a description of how any one application gets reviewed.	For the physical or operating address field, the place the business actually operates. A mail service agreement and Form 1583 matter only on an address line that takes a mail service address.
Bluevine (small business accounts)	Asks for a physical business address, or a home address if the business has no physical location, and says it cannot accept Registered Agent addresses, P.O. boxes, or mail service addresses. Neither of the two Bluevine help pages we read uses the term CMRA or mentions virtual addresses.	Your business's physical address, or your home address if the business has no physical location.
IRS: EIN application (Form SS-4)	The Form SS-4 instructions (Rev. December 2025) never mention CMRAs. The only P.O. box rule is on lines 5a and 5b, which ask for the entity's physical address. Form 1583 is a separate USPS requirement between you and the CMRA operator, and the SS-4 instructions do not ask for it.	Form 1583 signed and on file with the CMRA operator (for USPS compliance, not for IRS submission).
State LLC filing offices	Varies by state. Texas's formation instructions and California's Statement of Information instructions say the mailing address may be a P.O. box. California, Florida, and DC ask for a street address for the principal office, and Oregon's definition of principal office excludes a commercial mail receiving agency unless it shares the street address of the principal executive offices.	Check the specific state rule before filing.
Stripe and payment processors	For every US account, Stripe's support page asks for 'the address of the physical location where the majority of your business activity is carried out' and says P.O. boxes 'are not accepted.' Its money management products, including Issuing and Treasury accounts, add an address check that screens out commercial mail receiving agency, registered agent, and virtual address service addresses, and an account with one of those addresses 'will still be able to use Stripe for payment processing and other products.' A home address on a public receipt leaks privacy either way.	The physical location where most of your business activity happens. For money management products, that address also cannot be a mailbox, registered agent, or virtual address service.

What each institution publishes about mailbox, virtual, and CMRA addresses.

Checklist: Verify Your Address Before You Use It

Run through this list before an address goes on any application. Each step can be done in under a minute, and catching a problem here is the difference between same-day approval and a 3-week hold.

(1) Confirm the address is valid and deliverable in USPS data. A vacant or undeliverable address fails every downstream check.
(2) Check the CMRA flag. If flagged, prepare a lease or mail service agreement and a signed Form 1583.
(3) Check the RDI classification. Commercial tends to score best, and residential is fine for many uses.
(4) Confirm the address has a suite number if the building needs one. Missing suite numbers drop the score and can fail matching during bank verification.
(5) Match the exact mailing address on your state LLC filing, EIN letter, and your bank's mailing-address field, character for character.
(6) Run the same check on every location you are considering before you sign up, not after.
(7) Check whether the provider publishes a written guarantee for address rejections, and read the conditions on it: what counts as a rejection, what is refunded, and how long you have to claim it.

How to Check Your Address in 30 Seconds, Free

We built the save office address checker to cover the gap left by the retired USPS Web Tools API. It runs the same CASS-certified CMRA and RDI check, combines them with deliverability and building-type data, and gives the result a plain-English grade from A to F. It is free to use, and the addresses you look up are never published or shared.

Paste any US street address at the save office address checker. Within a few seconds, the tool returns the CMRA status, the residential or commercial classification, and a grade from A to F. When the address matches another provider's address on the tool's list of virtual office, mailbox, registered agent, and formation-service operators, it also shows short notes for uses such as an IRS EIN application, bank KYC, a state LLC filing, an Amazon seller account, and a USPTO trademark domicile address.

If the tool returns a grade that is lower than you need, every save office address we have checked is classified commercial in the same USPS data this tool reads. Whether any address clears a particular bank or filing office depends on that institution's own rule, which is why we publish the classification for each location and back it with the refund terms in section 6.4.

Beyond the CMRA Flag: Where Address Classification Keeps Showing Up

The CMRA check tends to be the headline, but the same USPS record follows the address into places founders do not always expect. Homeowners insurance, commercial insurance, payment processor approvals, Google Business Profile verification, import-export license applications, and certain SaaS vendor onboarding flows can all read it, though each applies its own rule to what it finds. Clearing bank verification is a good sign for the rest, but some systems exclude by business model rather than by the flag, and the companion guide to non-CMRA addresses covers where that distinction bites.

The real question is whether the address will hold up across every system you need it for, not just one application. A one-time 30-second check before the address goes on the first form is a cheap, simple safeguard.