Father Is Thai, Child Born in Laos: Why Can't the Child Get Thai Nationality?—A Thai Supreme Court Judgment from 20 Years Ago Explains It All

父亲是泰国人，孩子生在老挝，为什么拿不到泰国国籍？——泰国最高法院20年前这起判决说透了

ພໍ່ເປັນຄົນໄທ, ລູກເກີດຢູ່ລາວ, ເປັນຫຍັງຈຶ່ງບໍ່ໄດ້ສັນຊາດໄທ? —— ຄຳຕັດສິນຂອງສານປະຊາຊົນສູງສຸດໄທເມື່ອ 20 ປີກ່ອນ ອະທິບາຍໄດ້ຢ່າງຊັດເຈນ

Published: 2026-09-22 · LaoPaniti legal guides

A gentleman who has worked in Laos for many years had a child born in Vientiane. He holds a Thai passport and assumed the child was naturally Thai. It was not until he went to apply for documents that he discovered: the matter is far from being as simple as the word "bloodline."

The Supreme Court of Thailand (the Dika Court) once adjudicated a nationality determination case, with the Judgment rendered in 2000. The core issue of the Case was only one: Can a child born in Laos, whose father is Thai, but whose Parents are not married, acquire Thai nationality by birth?

How the Case Reached the Supreme Court

The Applicant argued that he should acquire Thai nationality, for a direct reason: his father is Thai. However, the facts ascertained by the Court were that the Applicant's mother is Lao, and although his father is Thai, he is not a father in the legal sense—because there was no Marriage relationship between the Parents, and the father's status was not legally confirmed.

This Case was litigated all the way to the Supreme Court of Thailand. The Court ultimately held: the Applicant does not acquire Thai nationality by birth.

Why the Court Ruled This Way

The key points of the Judgment are written very clearly: for a child born in Laos whose father is Thai but who did not enter into Marriage Registration with the mother, because the father is not the legal father, the child cannot acquire Thai nationality under Section 7(1) of the Nationality Law.

In other words, a bloodline connection and a parent-child relationship recognized under nationality Law are two different things. In making its determination, the Court looked at whether a legal Parent-Child Relationship was established, rather than merely looking at a biological connection.

This also involves the relevant provisions of Section 10 of the Nationality Law (No. 2), which the Court also considered in its adjudication.

What Warning Does This Case Give Cross-Border Families in Laos

First, birthplace is not the only criterion; the legal relationship of the Parents is equally crucial. The child was born in Laos, the mother is Lao, and the father is Thai—if the Parents have no Marriage relationship and the father's status has not been legally confirmed, the child's attempt to directly obtain Thai nationality will be blocked at the hurdle of "legal father."

Second, cross-border identity issues should be handled as early as possible for greater control. Many families only discover that their child's nationality status is unclear when the child needs to attend school, travel abroad, or apply for documents. Rather than being in a rush at that time, it is better to clarify basic legal facts such as the Parent-Child Relationship and Marriage status in advance.

Third, the rules of nationality Law differ greatly from country to country. This Judgment of the Supreme Court of Thailand was based on the relevant provisions of Thailand's Nationality Law, while Laos's local identity registration and parentage determination have their own set of procedures. Cross-border families often have to face two or even multiple sets of rules at the same time.

If you also encounter similar identity, nationality, or cross-border family legal issues, rather than guessing on your own, it is better to explain your specific situation clearly and let professional tools help you sort out your thinking first. 老法智 LaoPaniti provides free AI legal Q&A. You can go to https://www.123laoai.com to ask questions directly and get a clear answer to your legal confusion in Laos first.

This article was compiled by 老法智 LaoPaniti and is for reference only. It does not constitute legal advice.

FAQ

The child's father is Thai, but the two are not married. Can the child obtain Thai nationality?

According to the key points of the Judgment in this Case of the Supreme Court of Thailand, for a child born in Laos whose father is Thai but who did not enter into Marriage Registration with the mother, because the father is not the legal father, the child cannot acquire Thai nationality under Section 7(1) of the Nationality Law. For specific individual circumstances, it is recommended to further verify based on your own materials.

Why is it not enough that the father is Thai? Why also look at whether he is the "legal father"?

When determining nationality, the Court looks at whether a legally recognized Parent-Child Relationship is established. If the Parents have no Marriage relationship and the father's status has not been legally confirmed, then a bloodline connection does not automatically equal a father-child relationship in the sense of nationality Law.

When was this Case decided?

According to the source material, the Supreme Court of Thailand rendered the Judgment in 2000.

Legal basis

《国籍法》第7(1)条
《国籍法（第2号）》第10条

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