What Happens When FDA Contacts Your U.S. Agent?

Published by US Compliance Agent LLC

You have registered your foreign facility with FDA, designated a U.S. Agent, and listed your products. Everything is in compliance. Then one day, FDA sends a letter to your U.S. Agent. What happens next depends entirely on what kind of agent you chose.

This article walks through the most common types of FDA correspondence your U.S. Agent will receive and explains why the speed and quality of your agent's response matters.

The Most Common Types of FDA Correspondence

Registration Verification

After you complete your facility registration, FDA may send a verification communication to confirm that the information on file is accurate and that your U.S. Agent is valid. This is routine — the agent confirms receipt, and no further action is typically needed.

What a good agent does: Confirms receipt with FDA and notifies you that verification was completed. No urgency, but you should be aware it happened.

Inspection Notice

FDA conducts inspections of foreign manufacturing facilities. For cosmetics under MoCRA, FDA now has explicit inspection authority. For medical devices, FDA has been conducting foreign inspections for years.

An inspection notice informs you that FDA intends to inspect your facility. The notice may arrive weeks in advance for a planned inspection — or with very short notice in some cases.

What a good agent does: Forwards the inspection notice to you same day, flags it as urgent, and confirms with you that it was received and understood. Time matters here. Every day of delay in receiving an inspection notice is a day lost in preparation.

What a bad agent does: The notice sits in a scanning queue. You receive it three days later with no context. Your preparation window just shrunk by half.

Warning Letter

A warning letter is one of FDA's most serious enforcement communications. It identifies specific violations that FDA has found — whether through inspection, product testing, adverse event review, or other means — and demands corrective action within a defined timeframe, typically 15 business days.

What a good agent does: Forwards the warning letter immediately — ideally within hours of receipt. Flags it as the highest priority. Confirms delivery with you. A warning letter has a response deadline, and that clock starts ticking from the date on the letter, not from the date you receive it.

What a bad agent does: Treats it like routine mail. You receive it days later. Your response window is now critically compressed. FDA views late or non-responsive reactions to warning letters as a serious compliance failure.

Import Alert

If FDA determines that your products should be detained at the border — due to past violations, lack of registration, or other compliance issues — they issue an import alert. This means your products are held at U.S. ports of entry and may be refused admission.

What a good agent does: Forwards the import alert notification immediately and provides the relevant details so you can take action — whether that is working with your importer to resolve the issue, providing documentation to FDA, or adjusting your shipments.

What a bad agent does: You find out about the import alert when your importer calls to tell you their shipment is being held. By that point, product is sitting in a warehouse accumulating storage fees.

Adverse Event Inquiry

Under MoCRA, serious adverse events must be reported to FDA within 15 business days. If FDA receives an adverse event report about a product associated with your facility, they may contact your U.S. Agent to request additional information or follow up.

What a good agent does: Forwards the inquiry immediately and flags it as time-sensitive. Adverse event follow-ups have tight timelines and involve potential public health implications.

General Inquiry or Data Request

FDA may contact your agent with questions about your products, your manufacturing processes, or your registration information. These are less urgent than inspection notices or warning letters, but they still require timely responses.

What a good agent does: Forwards the inquiry same business day with a clear summary of what FDA is asking for and any deadlines mentioned in the correspondence.

Why Same-Day Forwarding Matters

The theme across all of these scenarios is the same: speed.

FDA correspondence is not marketing mail. It is not a newsletter. It is official regulatory communication from a federal agency, and much of it has deadlines — either explicit (respond within 15 days) or implicit (inspection scheduled for next month).

When your U.S. Agent receives a piece of correspondence from FDA, every day between receipt and forwarding is a day you do not know about something you need to act on. For a warning letter with a 15-day response deadline, three days of forwarding delay means you have just lost 20% of your response window.

This is why the choice of U.S. Agent matters. A virtual mailbox that scans mail once every 48 hours is not designed for this. A large regulatory firm with 30,000 customers may process your letter through a queue system. A dedicated agent service that forwards same business day gives you maximum time to respond.

What Your Agent Should and Should Not Do

Your Agent Should:

• Open and scan all correspondence from FDA on the day it is received

• Forward the scanned correspondence to your designated email contact immediately

• Flag time-sensitive items (inspection notices, warning letters, adverse event inquiries) as urgent

• Confirm with you that correspondence was received and understood

• Be reachable by phone during U.S. business hours in case FDA calls instead of writing

• Maintain records of all correspondence received and forwarded

Your Agent Should NOT:

• Respond to FDA on your behalf (unless you have specifically authorized them to do so)

• Provide FDA with information about your products, processes, or compliance that you have not approved

• Make regulatory decisions or give you legal advice about how to respond

• Delay forwarding to "review" or "analyze" the correspondence first

• Filter correspondence based on their own judgment of what is important

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Your agent is a communication channel. They receive, log, and deliver. The decisions about how to respond are yours — or your regulatory affairs team's, or your attorney's.

Choosing an Agent Based on Communication Quality

When you evaluate U.S. Agent providers, the single most important question to ask is: what is your forwarding SLA?

Same business day should be the minimum standard. Ask specifically:

• How do you receive mail? (Physical mail, email, or both?)

• How do you forward it? (Email with scanned PDF is the fastest.)

• What is your typical turnaround time from receipt to forwarding?

• Do you flag urgent items differently from routine correspondence?

• What happens if correspondence arrives on a Friday afternoon?

• How do you handle phone calls from FDA?

If a provider cannot answer these questions clearly, or if their answer is "we forward within 2 to 3 business days," that is not fast enough for FDA regulatory correspondence.

A Real Scenario

Consider a foreign cosmetics manufacturer in Guangzhou, China. They registered their facility under MoCRA, designated a U.S. Agent, and have been selling products in the U.S. for a year.

FDA sends a letter to their U.S. Agent in Ohio notifying them that FDA will be conducting an inspection of their facility in six weeks. The letter includes specific dates, documentation requests, and instructions for the facility to prepare.

With a responsive agent: The letter is scanned and forwarded the same day. The manufacturer receives it 8 hours later (due to time zones). They have 41 days to prepare. They organize documentation, brief their quality team, clean up their facility records, and are ready when FDA arrives.

With a slow agent: The letter sits for 4 days before being forwarded. The manufacturer receives it and then takes a day to translate and understand it. They now have 36 days — five fewer days to prepare for the most important regulatory event their facility has ever faced.

Five days may not sound like much. But for a facility that needs to prepare GMP documentation, organize batch records, brief staff, and possibly engage a regulatory consultant — those five days can be the difference between a smooth inspection and one that results in findings.

Getting Started

If you want a U.S. Agent that forwards FDA correspondence the same day it arrives, US Compliance Agent is built for exactly that. Our service includes same-day scanning and forwarding, urgent flagging for time-sensitive items, and availability during U.S. business hours for FDA phone calls.

Visit our pricing page to see plans for MoCRA, FDA Medical Devices, FCC, and other verticals, or contact us to discuss your needs.

US Compliance Agent LLC is a private company. We are not affiliated with, endorsed by, or connected to the FDA or any U.S. government agency. We do not provide legal advice, regulatory consulting, product testing, or certification services.