If stay is over 15 days, a letter of approval from the Ministry of Labor is required.
Business registration and business license of the inviting company in Thailand with the company’s stamp and authorized person’s signature.
A business invitation letter from the sponsoring company in Thailand. The letter should be printed on company letterhead stationery, addressed to “The Consulate of Thailand, Visa Section”, and signed by a senior manager. The business letter must adhere to the following guidelines:
A copy of ID card or passport of the signer of the employment letter.
Letter confirming employment details from an employer in home country signed by authorized person stating that the company will send the employee to Thailand for what specific purposes. If applying for multiple entry, the letter must confirm that Multiple Entry is needed because employee will travel several times over the …
Or another document that can verify current residency confirming with the consular jurisdiction and residency.
For the first visit.
e.g. Accommodation bookings, invitation letters from family/friends in Thailand (for the first visit)