Key Takeaways
- A CMRA (commercial mail receiving agency) is a private business that accepts USPS mail for its customers. UPS Stores, pack-and-ship shops, office business centers and virtual mailbox services are all CMRAs.
- A CMRA address has to show your box as "PMB" or "#". USPS prohibits any other label, so writing "Suite" for a mailbox breaks the rule.
- USPS keeps a CMRA table. Its address API returns a CMRA flag of Y for addresses in it, and address-validation tools pass the same flag to banks and platforms.
- Stripe, Mercury and Google each reject mailbox addresses in the field that asks where your business operates. Each platform sets its own rules, so check theirs.
- A CMRA address still works as a mailing address, including on the IRS Form SS-4 mailing line. It’s not a place of business.
- Every CMRA customer signs USPS Form 1583. Since May 1, 2024 you can sign in front of the CMRA, in person or on live video, or in front of a notary.
What is a CMRA address?
A CMRA address is the street address of a commercial mail receiving agency plus the number of your private mailbox (PMB). USPS defines a CMRA as "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" (USPS DMM 508.1.8). The carrier delivers to the CMRA, and the CMRA sorts the mail into its customers’ boxes.
Stripe’s docs give the familiar examples: "UPS Stores, FedEx Office locations, or virtual mail services" (source). USPS adds that office business centers and reshipping services are CMRAs too (source). A virtual mailbox that scans your mail is a CMRA with a scanner. Virtual Mail Hub mailboxes are CMRA addresses, and we say so up front.
How big is the CMRA network?
Nearly 12,000 CMRAs served more than 1.6 million registered customers as of February 2025, according to the USPS Office of Inspector General (OIG report 24-146-R25). The same report found "missing or outdated applications, inaccurate data, and incomplete mail samples" across the program, so expect USPS to keep tightening its checks.
Is a CMRA "licensed" by USPS?
Not in the way a bank is licensed. The CMRA’s owner or manager registers each location with the local postmaster on PS Form 1583-A and shows 2 IDs (source). Each customer then signs PS Form 1583, and the CMRA uploads it to the USPS CMRA Customer Registration Database and certifies every quarter that its forms are current. "Registered with USPS" is accurate. "Licensed" is not.
CMRA meaning in plain terms
- CMRA: commercial mail receiving agency, the business that receives the mail.
- PMB: private mailbox, your numbered box at that business.
- CMRA address: the CMRA’s street address plus "PMB 123" or "#123".
- Form 1583: your written permission for the CMRA to receive mail for you.
PMB address rules: how to write a CMRA address
USPS allows exactly 2 labels for a private mailbox: "PMB" or the "#" sign. Publication 28, the USPS addressing standard, says mail to a CMRA "must include either the PMB identifier or the #, followed by the appropriate private mailbox number. Use of any other identifier is prohibited" (USPS Pub 28, section 285).
| Format | Example | Allowed? |
|---|---|---|
| PMB on its own line | Jane Doe / PMB 234 / 10 Main St / City ST ZIP | Yes |
| # at the end of the street line | Jane Doe / 10 Main St #234 / City ST ZIP | Yes |
| CMRA suite plus PMB | Jane Doe / 10 Main St Ste 11 PMB 234 / City ST ZIP | Yes |
| CMRA suite plus # | 10 Main St Ste 11 # 234 | No, use PMB |
| Suite in place of PMB | 10 Main St Suite 234 | No |
| "PO Box" for a PMB | 10 Main St PO Box 234 | No |
Why "Suite" isn’t allowed for a mailbox
Pub 28 says it’s "not permissible to combine the secondary address element of the mailing address for the CMRA and the CMRA customer’s private box number" (source). A suite describes rooms in a building. A PMB describes a box inside the CMRA. Writing "Suite 234" for a mailbox mislabels it, and USPS may return the mail to the sender endorsed "Undeliverable as Addressed, Missing PMB or # Sign" (DMM 508.1.8.3).
Can a PMB be called a PO Box?
No. "The words POST OFFICE BOX or PO BOX and the private mailbox number cannot be used on the Delivery Address Line. Only the Postal Service is entitled to provide delivery to a PO Box" (source).
CMRA vs PO Box vs registered agent vs office
These 4 addresses get mixed up because they can all appear on a company’s paperwork. They do different jobs.
| CMRA address (PMB) | USPS PO Box | Registered agent | Office lease | |
|---|---|---|---|---|
| Who runs it | A private business | USPS | An in-state person or company you appoint | You, as tenant |
| Looks like | Street address + PMB or # | PO Box 123, or the Post Office street address + box number | The agent’s street address | Street address + suite |
| Paperwork | PS Form 1583 | A USPS box application | Named in your state filing | Signed lease |
| Main job | Receiving your mail and packages | Receiving your mail | Accepting legal papers (service of process) and state notices | Where the business works |
| Is it where you operate? | No | No | No, unless you work there | Yes |
PO Box vs CMRA address
The old line was that a PO Box can’t take UPS or FedEx parcels and a CMRA can. That’s now only partly true. Where USPS offers PO Box Street Addressing, you can use the Post Office’s street address with your box number and receive packages from UPS, FedEx, DHL and Amazon "as long as they comply with USPS mailing standards" (USPS). The practical differences today are who runs the box, what they do with the mail (a virtual mailbox scans and forwards it) and the paperwork.
Registered agent vs CMRA address
A registered agent is a state-law role, not a mailbox. Delaware, for example, requires a registered agent that is a company to "maintain a business office in this State which is generally open ... at sufficiently frequent times to accept service of process" (8 Del. C. § 132). A PMB can’t do that job. And a registered agent address isn’t your place of business either: Stripe screens both CMRA and registered agent addresses for its money management products (source).
Forming an LLC and need a registered agent in the state you chose? That’s what our sister company Registate does.
How banks and platforms detect a CMRA address
USPS keeps a list of CMRA addresses, called the CMRA table, and exposes it in its own data. The USPS Addresses API returns a field named `DPVCMRA`: "Y - Address was found in the CMRA table. N - Address was not found in the CMRA table" (USPS Addresses API). The same response says whether the address is a business address, vacant, or a central delivery point.
Address-validation vendors pass that flag along. Smarty, for example, returns `dpv_cmra`, which "indicates whether the address is associated with a Commercial Mail Receiving Agency (CMRA), also known as a private mailbox (PMB) operator", plus a residential/commercial indicator (Smarty docs). Any bank or platform that runs addresses through a tool like this at onboarding sees the flag in the response.
What happens when you leave the PMB off
Some people type the CMRA’s street address with no box number, hoping it reads as an office. Validators have a code for exactly that: Smarty’s footnote `R1` means "Confirmed address without private mailbox (PMB) info", and `RR` means the PMB was included (source). Leaving the box off doesn’t make the address a different building. It can also mean your mail never reaches you.
Platforms with their own lists
Some platforms don’t rely on USPS data alone. Stripe says it screens "against a proprietary list of addresses associated with registered agents, mailbox services and virtual address services" (source). When its check matches, the account gets the error `invalid_address_cmra_address` and the message "The address you provided appears to be associated with a mailbox or virtual address service, which we can’t accept" (source).
Documents that give it away
Detection isn’t only a database lookup. When a platform asks for proof of address, it wants a lease, utility bill, insurance policy or tax filing for that address (Stripe’s list). A mailbox service agreement isn’t a lease of space, and a PMB has no utility account. The paperwork shows the same thing the flag does.
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What banks, Stripe, Mercury and Google say about CMRA addresses
The rules differ by platform and by field. Most ask for 2 things: a place where the business operates, and somewhere to send mail. A CMRA address can be the second. It’s rarely accepted as the first.
| Who | What their own docs say | Source |
|---|---|---|
| US banks (the law) | The customer identification rule asks a company for "a principal place of business, local office, or other physical location". Each bank decides how it checks. | 31 CFR 1020.220 |
| Stripe payments | The business address must be a physical location. PO boxes, highway contract boxes and private mailboxes aren’t accepted. | Stripe |
| Stripe Issuing, Treasury, Opal, Corporate Card | Adds explicit CMRA and registered agent screens on the business and representative address. Existing accounts get 30 days to fix it. | Stripe |
| Mercury | The legal address must be a US physical address. It can’t be a PO Box, PMB or virtual office. | Mercury |
| Google Business Profile | Mailboxes at remote locations aren’t acceptable. A virtual office isn’t eligible unless it’s staffed. | |
| IRS Form SS-4 | Line 4 is the mailing address. Line 5 is the physical address, if different, and can’t be a PO box. | IRS |
| IRS Form W-7 (ITIN) | "Don’t use a post office box owned and operated by a private firm or company." | IRS |
Banks
Federal rules require a bank to collect an address for every customer. For a person it’s "a residential or business street address"; for a company it’s "a principal place of business, local office, or other physical location" (31 CFR 1020.220). The rule doesn’t name CMRAs, so a bank’s policy decides what it does with a flagged address. Some hold a PMB as a mailing address. For the operating address, expect to show a real location.
Stripe
For ordinary card payments, Stripe won’t take a PO box, highway contract box or private mailbox as the business address (source). For Issuing, Treasury for platforms, Opal and Corporate Card it goes further and blocks any CMRA or registered agent address, on both the business and the representative (source). Our Stripe verification playbook covers the rest of Stripe’s checks.
Mercury
Mercury says a company’s legal address can’t be a PO Box, PMB or virtual office (source). The Mercury address guide walks through what it does accept.
Google Business Profile
Google is blunt: "If your business rents a physical mailing address but doesn’t operate out of that location, also known as a virtual office, that location isn’t eligible for a Business Profile" (source). A coworking office qualifies only with signage, customers received in business hours and your own staff there.
Amazon and other marketplaces
Amazon’s seller identity checks, including its address step, are covered in our Amazon seller verification guide. Every platform sets its own rules, so check theirs before you pick an address.
Where a CMRA address works (and where it doesn’t)
A CMRA address is a good mailing address. Trouble starts when it’s entered in a field that asks where the business physically is. Read the field label before you type.
| Use | CMRA address? | Why |
|---|---|---|
| Mail and packages | Yes | That’s what a CMRA is for (DMM 508.1.8). |
| IRS SS-4 mailing address (line 4) | Yes | Line 4 is "the mailing address for the entity’s correspondence" (IRS). |
| IRS SS-4 physical address (line 5) | No | Line 5 asks for the physical address (IRS). |
| ITIN application (W-7) | No | The instructions bar private-firm mailboxes (IRS). |
| Registered agent address | No | The agent must keep an office open to accept service (8 Del. C. § 132). |
| Bank or Stripe business (operating) address | Usually no | They ask for a physical location (31 CFR 1020.220, Stripe). |
| Google Business Profile | No | Mailboxes and unstaffed virtual offices are ineligible (Google). |
| Website, invoices, customer letters | Yes | A mailing address. Label it as a mailing address. |
Can I use a CMRA address as my business address?
As a mailing address, yes. As the address where your business operates, usually no. State formation and annual report forms word their address fields differently, so read the label on your state’s form: “mailing address” is a CMRA’s job, “principal office” or “physical address” usually isn’t.
When you need a physical address instead
If a bank, Stripe or Google needs a place where you operate, the honest options are your home address, a coworking office that meets the platform’s rules, or a leased office. Virtual Mail Hub’s Office plan is a real office in a staffed building, with a signed 12-month lease and a utility account in your company’s name. It’s a different product from a mailbox, and each platform still applies its own rules.
Form 1583: the paperwork behind every CMRA address
Before a CMRA can receive your mail, you sign PS Form 1583, "Application for Delivery of Mail Through Agent" (USPS form, June 2024 edition). A company is listed in box 7 with its name, type, street address and place of registration, and a person signs for it.
- Who witnesses: you sign in front of the CMRA owner or manager, in person or on live audio and video, or in front of a notary (DMM 508.1.8.3). The notary must be commissioned in a US state, territory or DC (Federal Register, May 2, 2024).
- 2 IDs: a photo ID (a US or foreign passport works) and a second ID that shows your address, like a lease or insurance policy. A Social Security card, birth certificate or credit card doesn’t count (DMM 608.10).
- USPS database: the CMRA uploads the form and clear copies of both IDs to the USPS CMRA Customer Registration Database and re-certifies them every quarter (DMM 508.1.8.3).
The field-by-field walkthrough, including non-US IDs and online signing, is in our Form 1583 handbook. With Virtual Mail Hub you can complete it online.
CMRA rules you should know as a customer
Is a CMRA address legal?
Yes. USPS sets out how CMRAs work in its mailing standards. The only use it bans outright is illegal use: "A Private Mail Box (PMB) must not be used for, or in connection with, a scheme or enterprise that violates any federal, state, or local law" (DMM 508.1.8). Using a CMRA address where a platform asks for your physical location isn’t a USPS matter, but it can break that platform’s terms.
What happens to your mail when you close a PMB
The CMRA "must remail mail intended for the addressee (customer) for at least 6 months after the termination date", with new postage, or return it to the sender (DMM 508.1.8.4). USPS rules say neither you nor the CMRA files a change-of-address order with the Post Office (source), so update your address with banks, the IRS and your state yourself.
Mail for names not on your form
A CMRA can only accept mail for the people and businesses covered by a Form 1583. Mail for anyone else goes back to the Post Office endorsed "No Authorization to Receive Mail for this Addressee" (DMM 508.1.8.4). Add a new company or a second person before their mail starts arriving.
Why USPS is checking CMRAs more closely
A 2018 audit found that weak oversight left CMRAs "vulnerable to drug traffickers", and the 2025 follow-up still found gaps (USPS OIG). The quarterly database certification is part of USPS’s answer. For you, it means your IDs have to stay valid and your form has to stay current.
Your CMRA address was flagged: what to do
- 1Read the exact field that failed. A mailing address field and a business location field are different. Stripe, for example, names the failed field in the error (source).
- 2Move the CMRA address to the mailing field where the form has one. Keep it there for correspondence.
- 3Enter the address where the business actually operates in the physical address field: your home, a qualifying coworking office, or a leased office.
- 4Upload a document in the company’s or your name for that address if asked: a lease, utility bill, insurance policy or recent tax filing are the kinds of documents Stripe lists (source).
- 5Appeal only if the flag is wrong. Stripe allows an appeal with proof of address when the address really is where you operate (source).
- 6Watch the deadline. Stripe gives existing money-management accounts 30 days, then disables capabilities until the address is fixed (source).
Need a document list for each platform? The proof of address guide breaks it down.
CMRA address checklist
Looking for a mailbox with online Form 1583, scanning and forwarding? Compare Virtual Mail Hub plans.
Frequently asked questions
What is a CMRA address?
A CMRA address is the street address of a commercial mail receiving agency, a private business that accepts USPS mail for customers, plus your private mailbox number written as "PMB" or "#". UPS Stores and virtual mailbox services are common examples.
What does CMRA stand for?
Commercial mail receiving agency. USPS defines it as a business that accepts the delivery of US Mail on behalf of another person or entity as a business service.
What is a PMB address?
A PMB (private mailbox) address is a CMRA address. It is the CMRA’s street address followed by "PMB" and your box number, or "#" and the number.
Can I write "Suite" instead of "PMB"?
No. USPS Publication 28 says mail to a CMRA must use "PMB" or "#", and any other identifier is prohibited. Mail without it may be returned as "Missing PMB or # Sign".
How do banks know an address is a CMRA?
USPS keeps a CMRA table, and its address data returns a CMRA flag of Y for addresses in it. Validation tools pass that flag to banks and platforms, and some, like Stripe, also screen against their own lists of mailbox and virtual address services.
Is a UPS Store address a CMRA?
Yes. A mailbox at The UPS Store is a CMRA address, and Stripe names UPS Stores and FedEx Office locations as CMRA examples. The address has to show your box as "PMB" or "#".
Is a virtual mailbox a CMRA?
Yes. A virtual mailbox receives USPS mail for you as a business service, which is the USPS definition of a CMRA. You sign Form 1583 for it like any other CMRA.
Is a CMRA address the same as a PO Box?
No. A PO Box is run by USPS inside a Post Office. A CMRA is a private business with a street address. USPS also bars the words "PO Box" on a private mailbox address.
Can I use a CMRA address for my LLC?
As the LLC’s mailing address, usually yes. As its registered agent address, no, because the agent must keep an office open to accept legal papers. As its physical or principal business address, check your state’s form and each platform’s rules.
Can I use a CMRA address to open a bank account?
Usually only as a mailing address. Federal rules ask a company for a principal place of business or other physical location, and banks like Mercury say the legal address can’t be a PMB. Each bank sets its own rules, so check theirs.
Does Stripe accept a CMRA address?
Not as the business address. Stripe rejects private mailboxes on that field, and for Issuing, Treasury, Opal and Corporate Card it screens out CMRA and registered agent addresses on both the business and the representative.
Can I use a CMRA address on Google Business Profile?
No. Google says mailboxes at remote locations aren’t acceptable and a virtual office you don’t operate from isn’t eligible for a Business Profile.
Do I need a notary for Form 1583?
Not necessarily. Since May 1, 2024 you can sign in front of the CMRA owner or manager, in person or on live video, or in front of a US-commissioned notary.
What happens to my mail if I close my PMB?
The CMRA must remail it to you for at least 6 months after the termination date, with new postage, or return it to the sender. Update your address with every sender in that window.
