The Simple Version
There are two ways to authenticate a U.S. document for use in a foreign country:
- Apostille — a single-step certificate that works in all 125+ countries that are members of the Hague Apostille Convention
- Chain authentication (legalization) — a multi-step process required for countries that are NOT Hague Convention members
The country where you'll be using the document determines which process you need. If the country is a Hague member, use the apostille process described throughout this site. If it's not, you need chain authentication.
What Is the Hague Apostille Convention?
The Hague Convention Abolishing the Requirement of Legalisation for Foreign Public Documents (known as the Apostille Convention) was signed in 1961 and has been progressively adopted by countries around the world. As of 2025, there are 125 member states.
The Convention creates a standardized, simplified authentication process: a single certificate (the apostille) issued by a designated authority in the country of origin is accepted by all other member countries without further authentication. This replaced a cumbersome, multi-step "chain" that previously required embassy and consulate stamps.
Major Countries That Accept Apostilles (Hague Members)
| Region | Member Countries |
|---|---|
| Europe | All EU member states, UK (rejoined Nov 2024), Switzerland, Norway, Iceland |
| Americas | Mexico, Brazil, Argentina, Colombia, Peru, Chile, most of Latin America |
| Asia-Pacific | India (2005), Japan, South Korea, Australia, New Zealand, China (2023) |
| Middle East | UAE (2021), Israel, Turkey |
| Africa | South Africa, Morocco, Lesotho, Swaziland, Botswana, Cape Verde |
Countries That Still Require Chain Authentication (Non-Hague)
A smaller but significant list of countries are not Hague members. For documents bound for these countries, the apostille process does not apply — you need chain authentication:
- Saudi Arabia
- Qatar
- Kuwait
- Pakistan
- Canada (for most purposes — Canada is a Hague member but many Canadian institutions accept U.S. documents without apostille)
- Several countries in Sub-Saharan Africa and Southeast Asia
Countries join the Hague Convention regularly. China joined in 2023; the UAE joined in 2021; the UK rejoined in 2024. A country that required chain authentication two years ago may now accept apostilles. Always verify current membership at hcch.net before preparing your documents.
What Is Chain Authentication?
For non-Hague countries, U.S. documents require a multi-step authentication chain before a foreign government will accept them:
- 1
State-Level Certification
The document is certified by the Secretary of State in the issuing state (same as the apostille step). However, for non-Hague countries, this certification is not a complete apostille — it's an "authentication" that will be used as the base for further certifications.
- 2
U.S. Department of State Certification
The state-certified document is then submitted to the U.S. Department of State's Office of Authentications in Washington, D.C. The U.S. DOS certifies the state official's signature.
- 3
Embassy/Consulate Legalization
The U.S. DOS-certified document is then submitted to the embassy or consulate of the destination country in Washington, D.C. (or a consulate in your region). The embassy legalizes (stamps) the document for use in their country.
This chain authentication process adds several weeks and additional fees compared to the apostille process. Total cost including all steps: $50–$150+ per document depending on the destination country's embassy fees.
What Happens If You Use the Wrong Process?
If you submit an apostille to a non-Hague country's authorities, they will reject the document — they don't recognize apostilles from countries they haven't treaty-joined. If you complete a chain authentication for a Hague-member country, the document may be accepted (since it's been through more authentication steps, not fewer), but you've wasted significant time and money when an apostille would have been sufficient and faster.