1. Company's letter of certification stating the applicant is position,salary and purpose of stay in the Kingdom
2.copy of the company business license
3.letter of acceptance from the Ministry of Labour and Social Welfare.
4.Original letter of a company or issued by the Thai authorities concerned (either in Thai or English)notifying the name and position of the undersigned and stating the objective of the applicant is visit,duration of stay and assumption of responsibility during his stay