Upon official request, Royal Thai Embassy and Consulates-General may grant visas to diplomatic or official passport-holders who wish to assume duties at a foreign Diplomatic Mission or Consulate or International Organization in the Kingdom and to their family members. 

Documents required: 

1. Diplomatic / Official Passport with validity not less than 6 months
2. Visa application form completely filled out
3. Recent photograph of the applicant (3.5 x 4.5 cm.), taken within six months. The photograph should be glued to the form and not stapled. 
4. Evidence of travel to and from Thailand (air ticket).
5. Note Verbal and/or documents issued by the foreign government or international organization certifying the identity of the person concerned and his/her purpose(s) while residing in the Kingdom.

Application forms and other documents with any stapled on them will not be accepted.