Blog/US Business Setup

What Documents Do You Need to Form a US LLC from Overseas? (Articles of Organization)

A comprehensive legal documentation masterclass for foreign founders detailing state incorporation filings, Operating Agreements, IRS CP575 EIN letters, Registered Agent consents, and bank verification dossiers.

ADVAQ US Legal Advisory Team
15 Min Read Β· Updated July 2026
US Statutory Filing Verification Review
Core US LLC Document Stack
Articles of Organization

The state legal charter approved by the Secretary of State establishing corporate existence.

IRS Form CP575 (EIN Letter)

Official federal tax assignment document issued by the IRS Cincinnati international unit.

Operating Agreement

Internal legal contract specifying member equity, capital contributions, and voting rights.

Registered Agent Consent

Statutory acceptance document providing a physical state street address for legal notices.

1. Articles of Organization / Certificate of Formation

The Articles of Organization (known as the Certificate of Formation in Delaware) is the primary legal charter filed with the Secretary of State to create your US LLC.

It includes statutory elements:

  • Legal Company Name: Must include an approved designator such as "Limited Liability Company", "LLC", or "L.L.C.".
  • Registered Agent Address: Physical street address within the state of incorporation.
  • Management Structure: Specifying whether the LLC is Member-Managed or Manager-Managed.

2. The Operating Agreement (Internal Corporate Bylaws)

An Operating Agreement is a legal contract governing the internal operations, ownership splits, voting rights, and dissolution procedures of the LLC.

While state corporate law does not require filing the Operating Agreement publicly, US FinTech banks (Mercury, Relay) and payment processors (Stripe) mandate a signed copy to verify corporate ownership.

3. IRS CP575 EIN Confirmation Letter

Form CP575 is the official letter issued by the Internal Revenue Service assigning your LLC's 9-digit Employer Identification Number (EIN).

It acts as federal proof of your company's tax identity and is mandatory for bank account opening and federal tax filings.

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4. Comprehensive US Document Stack & Verification Matrix

Detailed side-by-side comparative analysis of corporate documents:

Document NameIssuing AuthorityPublic Filing StatusRequired Usage
Articles of OrganizationSecretary of StatePublic DocumentState Legal Charter & Entity Proof
Operating AgreementInternal Company DocumentPrivate & ConfidentialMercury Bank & Stripe Ownership Proof
IRS Form CP575 LetterInternal Revenue ServiceConfidential Tax DocumentBank Verification & IRS Tax Filings
Registered Agent ConsentRegistered Agent FirmPublic State RegistryStatutory Legal Mail Address Proof

6. KYC Documents Required for US Bank Account Opening

When submitting your remote US business checking account application with Mercury or Relay, foreign owners must provide:

Bank Account KYC Checklist:

  • Valid International Passport (colour scan of bio page).
  • State Approved Articles of Organization (PDF).
  • IRS CP575 or 147C EIN Confirmation Letter.
  • Signed LLC Operating Agreement.

Frequently Asked Questions

US FORMATION DOCUMENT SOLUTIONS

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Articles of Organization, IRS CP575 EIN letter, custom Operating Agreement, Registered Agent, and US bank setup handled by ADVAQ.