A mailbox or virtual office cannot be your FDA US agent

Updated 2026-08-24

The short answer

21 CFR 1.227 defines US agent. After the residence-or-place-of-business test, it adds this sentence: a US agent may not be in the form of a mailbox, answering machine or service, or other place where an individual acting as the foreign facility’s agent is not physically present.

A virtual office that rents a suite number, forwards post and offers a receptionist who does not work for your facility fails that sentence. So does a UPS Store box, a co-working mail slot, and an offshore “US address” product sold with FDA in the product name.

What “physically present” is doing in the rule

The agent is the communications link for both routine and emergency contact. FDA will treat what the agent says as coming from the facility, and will treat documents given to the agent as given to the facility.

If the only thing at the address is a box, there is no individual for FDA to reach. That is why the definition is written as a prohibition, not as a preference.

Cosmetics say the same thing in guidance

For a foreign cosmetic facility registering under MoCRA, FDA’s guidance describes the US agent as a person who resides in the US or maintains a US place of business and is physically present. It adds that a US agent should not be a mailbox, answering machine or service, or other place where the individual is not physically present.

Food and cosmetics are different programmes. The mailbox problem is not.

What we will put on a registration

We put a California street address where a person actually works: 17731 Irvine Blvd, STE 205, Tustin, CA 92780. The current fee for a year of that service is $299.

FDA is not affiliated with private agent firms and does not endorse them. We do not use the FDA logo on a “certificate” of agency.

Common questions

Is a registered-agent address for a company the same thing?

No. A corporate registered agent for state filings is a different legal role. FDA’s US agent is defined in 21 CFR 1.227 for food facilities, and separately for cosmetics under MoCRA.

What if the virtual office has a real street address?

The street is not the test. The test is whether an individual acting as the facility’s agent is physically present.

Can I use my customs broker’s mail drop?

Only if that broker agrees to serve, is physically present, and is not merely a drop. Many brokers will refuse the FDA role in writing.

Does FDA check?

For food facilities, FDA verifies that the named person agreed to serve before it confirms the registration. Agreement is not the same as an on-site inspection of the mailbox, but the definition still applies.

We already filed with a virtual address. What now?

Update the US-agent information. A change of US agent must be submitted within 60 calendar days.

Sources

• 21 CFR 1.227 — “A U.S. agent may not be in the form of a mailbox, answering machine or service, or other place where an individual acting as the foreign facility’s agent is not physically present.” — ecfr.gov
• FDA, Guidance for Industry: Registration and Listing of Cosmetic Product Facilities and Products — US agent for a foreign cosmetic facility; mailbox, answering machine or service should not qualify — fda.gov
• FDA, food facility registration fees — FDA is not affiliated with private US-agent businesses and they do not act on FDA’s behalf — fda.gov
• 21 CFR 1.234(a) — update a facility’s registration within 60 calendar days of any change, including a change of US agent — ecfr.gov

This guide is general information about who may serve as an FDA US agent, not legal advice, and it does not create a client relationship.