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www.immigration.go.th/content/service_18

In the case of being a family member of a Thai national (applicable only to parents, spouse, children,
adopted children, or spouse’s children):

Criteria for Consideration
(1) The alien must have been granted a non-immigrant visa (NON-IM).
(2) The alien must have proof of relationship.
(3) In the case of spouse, the relationship must be de jure and de facto; or
(4) In the case of children, adopted children, or spouse’s children, said children, adopted children,
or spouse’s children must not be married, must live with the alien as part of the family, and must not
be over 20 years of age; or
(5) In the case of parents, the father or mother must maintain an average annual income of no less
than Baht 40,000 per month throughout the year or must have deposited funds of no less than Baht
400,000 to cover expenses for one year.
For other necessary cases, the Commissioner or Deputy Commissioner of Immigration Bureau
is granted the authority to make decisions regarding approval on a case-by-case basis.
(6) In the case of marriage to a Thai woman, the alien husband must earn an average annual income
of no less than Baht 40,000 per month or must have no less than Baht 400,000 in a bank account in
Thailand for the past two months to cover expenses for one year.

Documents to be submitted
1. Application form
2. Copy of applicant’s passport
3. Copy of documents proving relationship, such as a marriage certificate, a birth certificate,
registration of child legitimization, household registration certificate, child adoption registration
certificate, or other evidence from the government or relevant agency
4. Copy of evidence proving the Thai nationality of the spouse, parents, children, or adopted
children, such as a national ID card, copy of household registration certificate, or other evidence
issued by the government or relevant agency
5. Only for Criteria (5) and (6), the applicant must attach a funds deposit certificate issued by a
bank in Thailand and a copy of a bankbook, or attach documents proving that the parents or alien
husband earns an average monthly income of no less than Baht 40,000 throughout the year, such as
any particular individual income tax return together with payment receipt, evidence of receiving
retirement pension, evidence of receiving interest from funds deposit, or evidence of having other
funds issued by the relevant agency. An affidavit must also be submitted confirming the alien’s
marital or parental status with a Thai national.