what is the hague apostille convention

The Hague Apostille Convention is a 1961 treaty, formally the Convention Abolishing the Requirement of Legalisation for Foreign Public Documents. It lets member countries accept each other's public documents with a single apostille certificate instead of full embassy legalization. The HCCH administers it, and it has 130 contracting parties as of July 2026.

how many countries are in the apostille convention

As of July 2026, the Hague Apostille Convention has 130 contracting parties, according to the HCCH status table. The number grows as new countries join. China's membership took effect March 7, 2024, and Canada's on January 11, 2024. Viet Nam joins September 11, 2026, and Thailand on February 28, 2027.

how do i check if a country accepts apostilles

Check the HCCH status table, the official list maintained by the Hague Conference on Private International Law. It shows every contracting party and each country's entry-into-force date. Membership changes over time, so verify the current status rather than relying on an older list before you send any document abroad.

The Hague Apostille Convention, Explained

Every apostille traces back to one treaty. Understanding that treaty explains why the process works the way it does, why the country list keeps changing, and why you always check membership before sending a document abroad.

This guide covers the 1961 Convention itself: what it is, how membership works, the difference between entry into force and accession, and how to check any country’s current status.

What the Convention is

The full name is the Convention of 5 October 1961 Abolishing the Requirement of Legalisation for Foreign Public Documents. People shorten it to the Hague Apostille Convention.

It solved a specific problem. Before 1961, a document used across borders had to pass through a chain of offices, ending at the destination country’s embassy. That chain was slow and expensive. The Convention replaced it with a single certificate: the apostille.

The treaty is administered by the Hague Conference on Private International Law, known as the HCCH. The HCCH maintains the official membership list and publishes guidance for how member countries issue apostilles. Our guide to what an apostille is covers the certificate the treaty created.

The core promise is simple. A public document apostilled in one member country must be accepted in every other member country, with no further legalization. That single rule is why the apostille exists at all.

What the Convention actually does

The Convention does one thing well: it abolishes legalization between members and replaces it with the apostille.

It applies only to public documents. That includes documents from a court, an administrative authority, a notary, and official certificates placed on private documents. Vital records, notarized papers, and government-issued certificates all fall inside this scope.

It does not apply to documents executed by diplomatic or consular agents, or to certain administrative documents dealing directly with commercial or customs operations. Those exclusions are narrow, and most personal documents are covered.

The Convention also does not change what a document says or means. An apostille verifies the signature and seal, not the content. A member country still applies its own law to decide what the document is worth once accepted. The US Department of State Office of Authentications issues apostilles for US federal documents on this basis.

How membership works

A country becomes bound by the Convention in one of two ways: ratification or accession.

Ratification applies to countries that signed the original treaty or were members of the HCCH when they joined. Accession applies to countries that join later without having signed first. The practical result is the same. Both make a country a contracting party.

Once a country is a contracting party, the Convention enters into force for it on a specific date. Before that date, the country is not yet bound, and apostilles do not apply to documents going there. After that date, they do.

As of July 2026, there are 130 contracting parties, according to the HCCH status table. That number has grown steadily as more countries join, and it will keep growing.

Entry into force versus accession: why the difference matters

This distinction causes real problems if you ignore it.

Accession is the act of joining. Entry into force is the date the Convention actually starts working for that country. There is usually a gap of several months between the two.

There is also a second wrinkle with accession. When a country accedes, existing members can object to that accession within a set period. If a member objects, the Convention does not enter into force between those two specific countries, even though both are contracting parties. This is rare, but it means “both countries are members” does not always guarantee the apostille works between them. The HCCH status table records these objections.

So a country can be a contracting party on paper while apostilles still do not apply to your document, either because the entry-into-force date has not arrived or because of an objection. The date and the country pair both matter.

The member list is a moving set

The list of members is not fixed. It changes as countries join and as entry-into-force dates arrive.

Recent additions show how active the list is. China’s membership took effect March 7, 2024. Canada’s took effect January 11, 2024. Both are now full apostille countries, and documents between them and the US use apostilles.

Pending additions matter just as much. Viet Nam is a contracting party, but the Convention enters into force for it on September 11, 2026. Until that date, a US document going to Viet Nam still needs full authentication and embassy legalization, not an apostille. Our Vietnam legalization page covers the transition.

Thailand follows on February 28, 2027. So a document sent to Thailand in early 2027 might need the old legalization chain or the new apostille, depending on the exact date.

The table below shows recent and pending changes.

Scope: recent and pending Hague Apostille Convention membership changes affecting US documents (verified July 2026).

Country	Status	Entry into force	Path for US documents now
China	In force	March 7, 2024	Apostille
Canada	In force	January 11, 2024	Apostille
Viet Nam	Pending	September 11, 2026	Legalization until in force
Thailand	Pending	February 28, 2027	Legalization until in force

Because the set moves, a country you checked last year may have changed categories. Always confirm the current status.

How to check a country’s status

There is one authoritative source: the HCCH status table. It lists every contracting party and the entry-into-force date for each.

Read the table for two things. First, confirm the country is a contracting party. Second, confirm the entry-into-force date has already passed. If both are true, and there is no objection between the US and that country, an apostille applies.

For a faster, plain-language answer, use our country checker. It tells you whether a destination accepts an apostille or requires full legalization, and it reflects pending entry-into-force dates. To map the full step-by-step process for your specific document, use the pathway checker.

If the country is not a member, you are on the authentication and legalization path instead. Our guide to apostille versus authentication explains that chain, and country pages like the Mexico legalization page cover specific destinations.

How the Convention works inside the United States

The United States has been a member since 1981. But the US has no single apostille office.

State-issued documents are apostilled by the issuing state’s competent authority, usually the Secretary of State. A California document is apostilled by California, as covered on the California apostille hub. A New York document is apostilled by New York, on the New York apostille hub.

Federal documents go only to the US Department of State Office of Authentications in Washington, DC. That office charges $20 per document and, by mail, takes about five weeks or more. Our federal apostille guide covers the process, and the FBI background check page covers that common federal document.

This split confuses newcomers, but it follows directly from the Convention. Each country designates its own competent authorities. The US designated many: every state plus the federal office. You can compare state fees, which range from $1 in Michigan to $40 in Connecticut, with our fee lookup tool.

Why the Convention still requires care

The Convention simplified legalization. It did not eliminate the need to check.

Membership changes. Entry-into-force dates lag. Objections exist between specific country pairs. A document needs the right underlying certification before any apostille can attach, as our certified copies guide explains.

So the treaty gives you a shortcut, but the shortcut only works when the destination is a current, in-force member and your document is the right type. Verify both, using the HCCH table and our country checker. Our methodology page explains how we keep this current, and our sources page lists what we rely on.

What the Convention does not cover

The treaty has clear limits worth knowing before you rely on it.

It covers public documents only. A private contract with no official certification is not a public document, so it cannot be apostilled directly. You first turn it into a public document, usually by having a notary certify a signature on it. Then the notary’s act is what carries the apostille.

It also excludes documents issued by diplomatic or consular agents, and certain administrative documents dealing directly with commercial or customs operations. These narrow carve-outs rarely affect personal documents like birth certificates or diplomas.

And the Convention never guarantees a document’s legal effect. A member country must accept the apostille as proof of the signature, but it still applies its own law to the document itself. An apostilled US divorce decree proves the court clerk’s signature; whether a foreign court recognizes the divorce is a separate legal question the Convention does not touch.

The e-APP: electronic apostilles

The HCCH also runs the Electronic Apostille Programme, known as the e-APP.

The e-APP promotes two tools. The first is the electronic apostille, an apostille issued in digital form with a verifiable signature. The second is the electronic register, an online database where a receiving party can confirm an apostille is genuine.

More US states are adopting electronic apostilles or online registers. The format still carries the same ten fields and the same French heading; only the medium changes. A receiving office can look up the certificate number in the issuing authority’s register to confirm it is real.

This does not change your basic path. You still send the right document to the right authority. But it explains why an apostille you receive may arrive as a secured PDF with a QR code rather than a stapled paper page.

Putting the Convention to work

For your own document, the Convention reduces to a short sequence.

Confirm your destination is a contracting party with a passed entry-into-force date, using the HCCH status table. Confirm your document is a covered public document with a verifiable signature. Send it to the correct US competent authority, state or federal. Receive the apostille. Send the finished document abroad.

If any step fails the test, you are likely on the legalization path instead, which our guide to apostille versus authentication covers. Country pages such as the United Arab Emirates legalization page handle non-member destinations.

Why the number keeps changing

The count of 130 contracting parties is a snapshot, not a fixed figure.

Countries keep joining. Each new accession raises the number once its entry-into-force date arrives. Over the past few years the pace has been steady, and large economies have joined, which is why the apostille now reaches far more destinations than it did a decade ago.

Two mechanics drive the change. Accession adds a country to the list. Entry into force activates it. Because a gap of several months usually sits between the two, the “members” list and the “in force for the US” list are not always identical on a given day.

This is exactly why a printed list goes stale. A guide written in early 2024 would not show Viet Nam’s September 11, 2026 date or Thailand’s February 28, 2027 date. Treat any fixed number as accurate only for the date it was checked, and confirm against the live HCCH status table.

A note on Hong Kong, Macao, and territories

Some places follow their parent country’s membership with their own arrangements.

Hong Kong and Macao, for example, have applied the Convention through China’s participation for years, with their own designated authorities. Certain overseas territories of member states are covered by specific declarations. These details live in the HCCH status table’s notes column.

If your destination is a special administrative region or an overseas territory, read the status table’s declarations rather than assuming the parent country’s rule applies unchanged. Our country checker folds these cases into a plain answer.