Thailand is not a member of the countries of the Hague Convention. So, You have to order Thailand Document Legalization, because Thailand hague convention apostille is not available. 

Four main steps are needed to achieve the legalization of the Thailand Embassy.

1- Document certification from your state for use in Thailand.

2- Document authentication from the U.S. Department of State for use in Thailand.

3- Stamp by the U.S. Arab Chamber of Commerce for use in Thailand.

4- Document legalization from the Embassy of Thailand.

We help you complete all Thailand legalization requirements. See the email address and contact phone number for each step. Provide an estimated processing time and fee for each step. Help create and print FedEx Airway invoices at discounted rates to send and receive your documents. Provide information about available expedited service.