International students are required to submit the documents at Ministry of Education in Thailand to verify student completion of high school from previous institution. The M6/high school Diploma name may diverse among countries (see list of high school diploma name ). Certificate from accredited institute can also be applied (see conditions for each certificate e.g. GED, GEC). Without verification of high school completion, student may not graduate. The process may take up to a year depends on the documents and previous institution.
Required documents for Foreign Educational Standard Equivalent are
Bureau of Education Communication
Ministry of Education
Rachadamnoen Nok Road, Dusit, Bangkok 10300 Thailand