Forming a U.S. LLC from Argentina happens entirely online, and so does almost everything that follows it: the operating agreement, the ownership paperwork a bank wants, and the mailbox form that gives your company a U.S. address. None of that requires a flight.
This guide covers that American paperwork, not Argentine tax residency, currency reporting or company law, which your accountant or attorney should answer.
What the state filing does not include
Once the state accepts your articles of organization, the LLC exists on paper. An EIN from the IRS usually follows. Neither one is the full package a bank, a payment processor or a serious U.S. client will ask to see before trusting the company behind the name, and neither one tells a counterparty who is actually behind the entity or how to reach them.
The pieces that tend to be missing for founders signing from Buenos Aires, Cordoba or Rosario:
- An operating agreement that members actually signed, rather than a template sitting unsigned in a shared drive.
- Ownership evidence: a membership certificate or a declaration naming who holds the company and who can act for it.
- A U.S. mailing address with its own notarized authorization form.
- A wet-ink original for the rare counterparty that will not accept a scan.
Software and services exporters have their own paper trail
Many Argentine founders use a U.S. LLC to invoice clients abroad for development, design or consulting work. That setup brings its own document habits: a signed services agreement that matches the LLC's legal name exactly, a tax form for the client's accounting team, and an operating agreement that spells out who can sign contracts on the company's behalf. When the founder is the sole member, a short resolution confirming that authority can prevent a client's compliance team from asking twice. Some clients also want a letter confirming that the LLC is in good standing with the state; that letter is ordered from the state itself, not notarized, but it often travels alongside the signed documents TR Signing Group prepares.
A mailbox needs its own notarized form
A virtual mailbox gives a founder in Argentina a stable U.S. address for bank letters and tax mail. Opening one usually means a notarized Form 1583, naming the LLC and the person responsible for its mail. TR Signing Group handles Form 1583 notarization for a virtual mailbox, and the field-by-field walkthrough in Form 1583 for an LLC covers the details that differ when the mailbox is for a company rather than a person.
Proving who owns the LLC
A bank or payment platform asking who owns this company wants a specific answer: names, and a signed document, not a verbal explanation. Depending on what the institution requests, that might be a membership certificate, an ownership declaration, or a resolution. TR Signing Group executes these as notarized corporate ownership documents, and what banks actually ask for in a membership certificate explains the common variations.
When a scan will not do
A handful of banks and some larger U.S. clients still insist on a wet-ink original for a specific document, most often a resolution tied to opening or changing a bank account. From Buenos Aires, that usually means printing the finished, notarized document, signing it again in ink, and shipping it with a tracked courier, since ordinary mail gives neither side a reliable way to confirm it arrived. Keeping a full scan on file before the package ships lets the bank move ahead with a copy while the original is still in transit, and it gives you something to point to if a page goes missing along the way.
Signing the documents from Argentina
Founders in Argentina generally choose between the U.S. Embassy or a consulate, a local notary whose certificate some U.S. recipients accept and others do not, and remote online notarization with a U.S. commissioned notary. For bank and mailbox paperwork, online sessions tend to be the simplest option, with no appointment backlog, and evening availability in Buenos Aires lining up with daytime hours in New Jersey. Our guide on notarizing U.S. documents from Argentina walks through each option in more detail.
How TR Signing Group handles it
TR Signing Group executes the American side of a founder's paperwork: reviewing what a bank or platform asked for, preparing an operating agreement or resolution for signature, running the notarization by video, and shipping originals when a scan will not do. Structuring the company and its tax position stays with your accountant. See support for foreign founders forming a U.S. LLC, or request a quote with the list your bank or client sent you.
Ready when you are
Services for this guide
U.S. LLC Support for Foreign Founders
Foreign founders: we coordinate your U.S. or Wyoming LLC formation and execute the documents around it: operating agreement, membership certificate, Form 1583, ownership declarations, apostille.
USPS Form 1583 / Virtual Mailbox
Get your USPS Form 1583 notarized online and validated by your virtual mailbox provider the first time, from anywhere in the world. IDs checked before the session, form returned promptly.
Corporate Ownership Documents
Bank-account ownership documentation, notarized: sole shareholder declarations, ownership confirmations, membership certificates and shareholder documents for banks, payment providers and partners. Sole shareholder declarations, ownership confirmations, membership certificates and shareholder documents executed and notarized for banks, payment providers and partners in the U.S. and abroad.
Print / Wet Ink / Scanback / Mail
We print your document in the U.S., handle wet-ink signing and notarization, scan it back the same day and mail the originals with tracking. For clients abroad and busy professionals.
Not sure which one? Book a free 15-minute video call
Questions we hear often
Do I need to visit the United States to sign documents for my Argentine-run LLC?
Usually not. Most banks, platforms and mailbox providers accept remote online notarization for these documents, as long as the receiving institution allows it.
Which identification do I need for a remote notarization from Argentina?
A valid passport is the usual requirement. The notary confirms your identity on camera, so the name on the document should match it exactly.
Can TR Signing Group tell me which state to form my LLC in?
No. That decision depends on tax and legal factors specific to your situation, so it belongs to your accountant or attorney. We handle the signing and notarization once that choice is made.
Why did the mailbox provider reject my Form 1583?
A mismatched name between the passport and the form, or a company name that does not match the filed articles exactly, are the most common reasons. Checking both before the session avoids most rejections.
Does a notarized ownership document prove that I legally own the LLC?
It proves that the named signer executed the document willingly, with identity confirmed. Whatever the document states about ownership is a legal question for your attorney, not something the notarization decides.
Notary and document-execution services only. TR Signing Group does not provide legal, tax or immigration advice and is not affiliated with USCIS or any government agency.