Step-by-Step: Legalizing U.S. Documents for Use in Thailand

🌐 How to Submit Apostille Documents to the Thailand Embassy (or Consulate) — Step-by-Step Guide

If you’re sending U.S. documents for use in Thailand, it’s important to understand that Thailand is not a member of the Hague Apostille Convention. This means that a simple apostille is not sufficient — you must go through the embassy legalization process.

Here’s how to submit your documents to the Royal Thai Embassy or Consulate for legalization:

✅ Step-by-Step: Legalizing U.S. Documents for Use in Thailand

🔹 Step 1: Prepare the Original Document

Depending on the type of document, it must be:

• Notarized by a licensed notary public (e.g., affidavits, powers of attorney, letters)

• Or a certified copy from the issuing government office (e.g., birth, marriage, death, divorce certificates)

➡️ Tip: Photocopies are not accepted unless they’ve been notarized and certified.

🔹 Step 2: Authenticate the Document at the State Level

If the document is notarized or issued in a specific U.S. state:

• Submit it to that state’s Secretary of State for authentication (NOT an apostille).

➡️ Example: For a notarized affidavit from California:

• Submit to the California Secretary of State for authentication (not apostille).

🔹 Step 3: Submit to the U.S. Department of State

Once you have the state authentication, send the document to:

U.S. Department of State — Office of Authentications

600 19th Street NW

Washington, DC 20006

Website: https://travel.state.gov

• Include:

✅ Your authenticated document

✅ Completed DS-4194 form

✅ Payment (typically $20 per document)

✅ Self-addressed return envelope

⏱ Processing Time: 2–3 weeks, or expedited via a registered provider like Orange County Apostille.

🔹 Step 4: Submit to the Royal Thai Embassy or Consulate

Once your document is authenticated by the U.S. Department of State, you must submit it to Thailand’s diplomatic mission in the U.S. for final legalization.

📍 Thai Consulates in the U.S.:

• Thai Consulate in Los Angeles

Website: www.thaiconsulatela.org

• Royal Thai Embassy in Washington, D.C.

Website: https://thaiembdc.org

✅ What to Include in Your Embassy Submission

Each Thai consulate may have slightly different requirements, but generally:

📦 Mailing or Walk-In?

• Some consulates accept walk-in applications with appointments.

• Others may require mail-in only — check the specific location’s instructions.

❗ Important Notes

• Do not send apostilled documents — Thailand does not accept apostilles.

• The entire process can take 3–6 weeks without help. Expedited services (like Orange County Apostille) can reduce turnaround time.

• Translation into Thai may be required depending on the Thai agency you’re dealing with. Ask the end recipient if this is necessary.

🟠 How Orange County Apostille Can Help

We offer full-service embassy legalization for Thailand, including:

• Notarization (if needed)

• State authentication (e.g., California)

• U.S. Department of State authentication (via our D.C. office)

• Thai Embassy or Consulate legalization

• Certified translation (if requested)

📞 Call us or visit https://orangecountyapostille.org to begin your Thailand legalization process today.