What Is an Apostille, and When Does a Foreign Bank Need One?

"Apostille certificates are for documents you use in countries in the 1961 Hague Convention Treaty. Authentication certificates are for documents you use in countries not in the 1961 Hague Convention Treaty."

US Department of State, Preparing a Document for an Apostille Certificate.

Check whether the destination country is a party before you start. If it is not, you need an authentication certificate and usually consular legalization on top, which is the longer process the Convention was written to avoid.

This routing question costs founders weeks.

State-issued documents go to that state's Secretary of State. Your articles of organization, your certificate of good standing and your certified formation documents are state documents. The competent authority is the state that issued them, generally the Secretary of State's office.

Federal documents go to the US Department of State's Office of Authentications. That applies to documents signed by a US federal official, a US consular officer, or a foreign consul registered with the Office of Protocol.

Almost everything a foreign bank asks a US LLC for is state-issued, so almost always the answer is your formation state, not Washington. Sending state documents to the federal office gets them returned.

The treaty is the Convention of 5 October 1961 Abolishing the Requirement of Legalisation for Foreign Public Documents. The Hague Conference publishes a live status table, and on September 2, 2026 it said:

Number of Contracting Parties to this Convention: 130

Do not write that 130 countries accept apostilles. The same page defines the term in a way that makes the number larger than the working reality:

The expression "Contracting Party" covers both cases in which the Convention has, and cases in which the Convention has not yet, entered into force for that Party following the deposit of its instrument of ratification, accession, acceptance or approval

Three of the 130 are inside the count with the Convention not yet operative for them. Algeria entered into force. Viet Nam does not until September 11, 2026, nine days after we read the table. Thailand does not until February 28, 2027. A document sent to Hanoi in the first week of September 2026 still needs consular legalization, and a page citing "130" would tell you otherwise.

Recent entries worth knowing, because they changed the answer for a lot of founders:

The United States acceded, in force October 15, 1981.

And there is a second reason the count overstates it. Accession is bilateral, not universal. Article 12:

Such accession shall have effect only as regards the relations between the acceding State and those Contracting States which have not raised an objection to its accession in the six months after the receipt of the notification referred to in sub-paragraph d) of Article 15.

An objecting state and an acceding state have no apostille relationship with each other even though both appear in the 130. So the question is never "is this country a party." It is "is this country a party, in force, and not in an objection relationship with the United States." Check the status table for the specific pair before you pay for anything.

Verified from each Secretary of State on September 2, 2026:

Delaware is the fastest by mail, which is the only route that matters to you. Its own wording: "Requests received by mail are typically processed on the same business day." California is faster on paper, over a counter, and requires you to be standing in a Sacramento or Los Angeles office, which most readers of this page are not. Delaware also sells an escape hatch nobody else does, at a price that tells you who buys it: four figures per document for one-hour service, and half that for two-hour.

Florida says out loud that it will not hurry. "We do not offer expedited services," alongside a five-working-day floor. If a bank has given you a deadline, Florida is the state where that becomes a problem.

Wyoming and New Mexico publish no turnaround at all. We looked. Wyoming publishes the fee and an appointment-only rule for in-person requests, and no processing time on any reachable page. New Mexico publishes its fee and its office hours. Treat both as unknown rather than fast.

California's number moves. It publishes a rolling position date rather than a committed turnaround, and on the day we read it the Sacramento office was working on requests received nine days earlier. That figure will not be nine days when you read this.

Delaware will not accept a remotely notarized document. In its own words: "Please be advised we will not accept documents that are notarized remotely or electronically for apostille." For a founder abroad who arranged an online notarization because flying to a notary was absurd, this is the whole trip wasted.

Delaware certifies per document. "Whenever an apostille is requested for documents that have been filed with the Secretary of State, each document must be certified separately." Two documents is two certifications, not one.

Texas routes entity documents to a different team. The Authentications unit will apostille a certified copy of your certificate of formation, but: "The Authentications unit does not apostille or authenticate original business, or corporation documents issued by the Office." Those go to the Corporations Certifying Team. Send them to the wrong unit and they come back.

Florida wants two separate payments. If you are ordering the certificate of status and the apostille together: "Fees must be submitted using two separate checks or money orders."

Only two of the six states say so in as many words.

Florida, explicitly, allows you to submit an existing certified copy or certificate of status, or to order both at once.

Texas, explicitly: "A universal Apostille may be issued for certified copies of business organization documents on file with the Secretary of State, like certificates of formation. They may also be issued for certificates of fact issued by the Secretary of State."

Delaware, by implication, in the per-document certification rule quoted above, which is written about documents filed with the Secretary of State.

Wyoming, New Mexico and California publish prerequisites but never name a business filing. Wyoming requires certification by a Wyoming official and original signatures. California requires an original signed by a California public official or an original notarized or certified document. Neither names a certificate of status, and we are not going to infer that they accept one. Call before you send.

The last row is worth flagging. A foreign institution sometimes asks for an apostilled EIN letter without understanding that it is a federal document on a different track. Ask them whether a certified state document plus the EIN letter unapostillized will do, because it usually will.

Typically when you are opening an account for your US LLC in your own country, or registering the US entity locally, or a local registry needs proof the company exists.

Ask three questions before starting: which specific documents, whether they need an apostille or full legalization, and how recent the underlying document must be. A certificate of good standing is usually treated as stale within a few months, so sequencing matters. Order the certificate, then apostillize it, then submit, without long gaps.

Cost and turnaround were not retrieved, and both vary by state and by whether the federal route is involved. Get the figure from the issuing authority.

We have not verified the current list of Hague Convention parties. It changes as countries accede, so check the HCCH status table for your destination rather than relying on a list published anywhere else.