Company addresses

A company has four addresses and only one of them is yours

Ask an assistant for “the legal mailing address for ACME” and you get an address. What you rarely get is the question behind it: legal for what? A notice under a contract, a pre-lawsuit demand and formal service of process go to three different places, and picking the wrong one is how a notice arrives and still counts for nothing. This page sets out which address governs in which situation, where each one is published, and what the public record is worth.

The four addresses, in the order that decides which one wins

1. The notice address in your contract. If you have an agreement with the company and it has a “Notices” clause, that clause wins. It names an address, often a department, sometimes a required method, and courts hold people to it. Read it before you look anywhere else. A perfectly delivered letter to the head office is still a defective notice if the contract named somewhere different.
2. An address the law fixes for that kind of letter. Several consumer rules designate the address themselves, and the designated one is the only one that counts: a mortgage servicer’s notice-of-error address, a furnisher’s dispute address, a debt collector’s address on its validation notice. Those override everything below.
3. The registered agent for service of process. Every corporation and LLC registered in a state must keep an agent there to accept legal papers, and the agent’s name and street address are on the public register. This is the address for suing, and it is the right one for a pre-lawsuit demand when nothing above applies.
4. The head office or principal place of business. Useful for reaching a person who can decide something. It is the weakest of the four as a legal address, and on its own it is the usual reason a notice fails.

Work down that list and stop at the first one that applies to your letter.

How to find the registered agent, free, in about a minute

Every state runs a business search on its Secretary of State site and every one of them is free to use. Search the company’s legal name, open the entity, and the record shows the registered agent, the agent’s street address, the entity’s status and the date of the last filing.

1. Search the state where the company is registered, which is often not the state you are in. A company doing business in your state normally registers there as a foreign entity and appoints an agent there too, so your own state’s register is usually the right place to start.
2. Use the legal name, not the brand. The sign on the door and the name on the register are frequently different, and the difference matters on the envelope.
3. Check the status. An entity shown as suspended, forfeited or dissolved changes what you are dealing with, and sometimes who is personally on the hook.
4. Note the filing date. See the next section.

For a California entity the register is the Secretary of State’s bizfile search; the agent comes from the entity’s Statement of Information.

How stale the public record is, which nobody tells you

Registered agent data is only as fresh as the last filing, and those filings are periodic rather than continuous. California corporations file a Statement of Information annually and most LLCs file every two years, so a California agent address can sit on the public register for up to two years after the company moved. Other states are similar or slower.

Two practical consequences. First, check the filing date before you rely on the address, and if it is old, send to the agent and to the head office. Second, keep the page you took the address from, with its date, because the argument later is not about whether you were careful, it is about what the record said on the day you looked.

What Piloxa does and does not do here

Piloxa mails the letter and keeps the proof. It does not tell you which address is the right one for your dispute, and it will not guess a company’s legal address for you. The reason is the asymmetry: an address that is wrong costs a person a deadline, and no automated lookup of fifty state registers is reliable enough to carry that. The registers are the source; this page is the method for reading them.

What Piloxa does record is exactly what was printed on the envelope, alongside the exact letter and the date USPS accepted it. If the address is later argued about, the record says what was sent, where, and when.

What you end up holding

• The exact letter that was approved, kept unchanged, with the fingerprint that shows it is the same file.
• The recipient address as it was printed, after the postal check.
• The mailing record: the service that was bought, when the letter was handed over to be printed and mailed, and the reference the printer gave it.
• The sentence you authorized, and the time you authorized it.

You are buying USPS Certified Mail, so the Postal Service keeps its own delivery record. Piloxa asks the printing partner for that history on its own, without anyone pressing anything, and adds each scan to your record as it is reported, naming where it came from. If you chose the return receipt, the signature of whoever accepted the letter is recorded the same way once USPS releases it. Where nothing has come back, the record says “no record yet” rather than guessing. The sample record shows every state, including the incomplete ones.

Certified Mail proves that something was delivered. It does not prove what was inside. Keeping the approved letter beside the mailing record is what closes that gap, and it is the whole reason this exists. See a filled-in record.

Common questions

What is the legal mailing address for a company?

There is no single one. For a notice under a contract it is the address in the Notices clause. For a credit dispute, a debt validation letter or a mortgage notice of error it is the address that rule designates. For a legal demand or a lawsuit it is the registered agent for service of process, on the state’s public business register. The head office is the weakest choice and the most common mistake.

Is the registered agent the right place for a demand letter?

Usually yes, when no contract clause and no rule says otherwise. The agent exists to accept legal papers, so a demand letter sent there reaches the people who assess legal risk rather than a support queue. Sending to the agent and the head office together costs one extra letter and removes the argument.

Where do I find the registered agent?

On the Secretary of State business search for the state the company is registered in. Every state publishes one, free. Search the legal name, open the entity record, and read the agent’s name, street address, the entity status and the date of the last filing.

How current is that address?

As current as the last filing. California corporations file a Statement of Information every year and most LLCs every two years, so an address can be up to two years old and still be the official one. Check the filing date, and save the page you took it from.

Can Piloxa look the address up for me?

No, and that is deliberate. Fifty state registers with different formats and different filing cycles cannot be turned into a reliable automatic answer, and a wrong address on a legal notice costs a deadline rather than a delivery. Piloxa prints and mails what you give it, and records exactly what went on the envelope.

What does it cost to send?

$13.18 all in for a one-page letter by USPS Certified Mail, or $16.17 all in with the electronic return receipt, which records who signed for it. Printing, envelope and postage are included, with no subscription and no minimum.

Primary sources

• California Secretary of State — business search
• California Secretary of State — Statements of Information and how often they are filed
• USPS Postal Explorer: what Certified Mail documents

References last reviewed September 22, 2026. Registered agent records are only as current as the entity’s last filing; check the filing date before relying on one.

Other letters people send certified

• Credit report disputes
• Debt validation letters
• Mortgage notice of error
• California HOA pre-lien notices
• Refund demands
• Notice of intent to sue