Form 1583 for an LLC: what changes when the mailbox is for your company

When a virtual mailbox is opened for an LLC or a corporation, Form 1583 still has to be signed and notarized by a person, but it also describes the company: its legal name, its type of business, and the people allowed to receive its mail. Most providers also ask for company documents on top of personal identification.

This guide covers what changes for a business mailbox, who signs, what to gather first, and where founders abroad tend to get stuck. For the general process, see our guide on USPS Form 1583 notarized online.

What is different when the applicant is a company?

For a personal mailbox, the form links one person to one mailbox. For a company mailbox, it links a business to the mailbox and names the individuals who act for it:

• The business section must be completed: the exact legal name as it appears on the formation documents, the type of business, and the business address details the form requests.
• A responsible person signs: usually a member, manager or officer, who provides their own identification exactly as on a personal form.
• Mail recipients are listed: depending on the provider, each may need their own form and identity verification.
• Proof that the company exists is often requested: the certificate of formation, articles of organization or incorporation, or a similar record.

Providers apply these rules differently, so read your provider's instructions for business accounts before you fill anything in.

Who should sign the form?

The signer is usually someone with authority to act for the company, such as a managing member of an LLC or an officer of a corporation. They sign in their own name, with their own identification, in front of a notary. The notary verifies the signer's identity and witnesses the signature. The notary does not verify authority within the company and does not advise on how your company should be structured.

If two founders both need to receive mail, ask the provider whether one form with both names is enough or whether each founder needs a separate notarized form. If separate forms are required, it is often easiest to schedule the notarizations together.

What to prepare before the notarization

Gather everything first, then complete the form. A business form that matches its documents goes through much more smoothly.

1. The company's formation document, so you can copy the legal name exactly, including the suffix (LLC, Inc., Corp.).
2. Any proof of the company the provider asks for, such as articles, a certificate of good standing or an EIN confirmation letter.
3. Photo identification for each signer, matching the provider's accepted list.
4. Each signer's home address exactly as it appears on their proof of address.
5. The list of people who will receive mail, with full names as on their IDs.

Common problems with company mailboxes

• The company name is written differently from the formation document, for example without the suffix or with a trade name instead of the legal name.
• The company is not formed yet. Most providers want the company to exist before they activate a business mailbox.
• A person receiving mail has not verified their identity, so the account stays on hold.
• The signer's personal address is confused with the business address. The form asks for both, and they serve different purposes.

If a provider has already sent your form back, our guide on why Form 1583 gets rejected lists the usual causes and how to fix them.

Founders abroad: forming the LLC and opening the mailbox

Many founders outside the United States need a U.S. mailing address while they form their company, for bank correspondence, state notices and registered documents. The order usually matters: first the company is formed, then the mailbox is opened in its name, then Form 1583 is notarized for the business.

If you are still at the formation stage, the U.S. LLC formation support for foreign founders helps you get the paperwork in order, so the documents your mailbox provider asks for are ready. Choices about the state, tax treatment or ownership structure are questions for your accountant or attorney.

Remote online notarization usually keeps the mailbox step simple: each signer joins a video session with a U.S. notary from wherever they are, shows their original IDs, and signs electronically. Confirm first that your provider accepts remotely notarized forms.

After the mailbox is approved

Keep the notarized form and the documents you submitted. If a new person needs to receive mail later, or the company changes its name, the provider will usually ask for an updated form. Updating it promptly avoids mail being held or returned.

How TR Signing Group handles it

TR Signing Group checks your business Form 1583 against the company's formation document and each signer's identification before anything is signed. Tanim Raquib, a commissioned New Jersey notary public, then notarizes the form for each signer, remotely or in person, and you receive files ready to upload to your provider. Learn more on the Form 1583 virtual mailbox service page, or request a quote and tell us how many people need to sign.