Thailand has become one of the world’s most popular bases for international couples, the kind of place where two foreign nationals build a life, raise children, and, not infrequently, accumulate assets across three or four countries before the marriage ends. Most published guidance on Thai divorce, though, is written for the mixed Thai-foreign couple. The practitioner literature walks through Sin Somros and Sin Suan Tua, land-ownership restrictions, and the Land Office’s nominee rules, and stops there.
That body of guidance quietly assumes a fact pattern that doesn’t hold for a large and growing category of cases: two foreign nationals, often sharing a single nationality, who married in Thailand without a marriage contract, built up assets across several countries, and now need a Thai court to grant the divorce. For this group the questions that matter are different, and the answers are far less settled in the commentary. This article sets out the conflict-of-laws framework that actually governs that scenario, and the practical traps it creates.
Two Different Questions, One Courtroom
The starting error in most informal advice is treating “which court can grant the divorce” and “which law decides who gets what” as the same question. They are not. A Thai court can have every right to hear a divorce between two nationals of the same country, or between spouses of two different nationalities entirely, while being formally required, under Thailand’s own conflict-of-laws statute, to apply someone else’s property law to divide the marital estate. Jurisdiction answers where the case is heard. Applicable law answers whose rules decide the outcome. Confusing the two is probably the most common source of surprise in these files.
The governing statute for the second question is the Act on Conflict of Laws, B.E. 2481 (1938), a piece of legislation now nearly ninety years old, largely unamended, and rarely engaged with in any depth once a case is framed, incorrectly, as a routine Thai property dispute.
Jurisdiction: When a Thai Court Will Hear the Case
Thai courts do not require either spouse to hold Thai nationality. In practice, jurisdiction over a divorce between two foreign nationals is generally accepted where at least one of the following is present: one or both spouses is resident in Thailand, the marriage was registered in Thailand, a minor child of the marriage lives in Thailand, or the couple holds property in Thailand. This tracks the general territorial jurisdiction rules under the Civil Procedure Code, which permit a case to be filed where a party is domiciled in Thailand or the cause of action arose there, rather than anything in the Civil and Commercial Code itself. Meeting any one of these is usually enough to proceed. This part of the analysis is well trodden and rarely disputed in practice. The harder questions start once jurisdiction is established.
Choice of Law for the Divorce Itself
Sections 26 and 27 of the Conflict of Laws Act deal with the divorce as a status matter, separately from its property consequences. A divorce by mutual consent is valid if permitted under the national law of both spouses. A Thai court cannot grant a divorce at all unless divorce is permitted under each spouse’s law of nationality, but the grounds on which the divorce is actually argued and decided are governed by the law of the forum, meaning Thailand’s own Civil and Commercial Code, Section 1516.
In practice this rarely creates friction between two nationalities that both permit divorce on a recognized ground, which covers most of the developed world. It becomes more consequential only where one spouse’s national law restricts or complicates divorce, which is worth checking early but is not the central issue for most files in this category.
Choice of Law for Matrimonial Property: The Real Problem
This is where the analysis most often goes wrong, and where existing commentary is thinnest. Section 22 of the Act provides, in substance, that absent an ante-nuptial agreement, the property of husband and wife is governed by the law of their nationality. If the spouses hold different nationalities, the law of the husband’s nationality governs. Immovable property, however, is always governed by the law of the place where it is situated, regardless of nationality.
Two consequences tend to get missed here, and they pull in different directions.
Where both spouses share a single foreign nationality, a common pattern among expatriate couples who marry in Thailand, their matrimonial property regime is not, as a matter of Thai law, Sin Somros and Sin Suan Tua at all. It is whatever their shared national law provides by default in the absence of a marriage contract, whether that is a community-property regime, a discretionary distribution on divorce, a deferred community-of-gains system, or something else entirely, each with its own default rules and its own treatment of pre-marital assets. A Thai court hearing such a case is, formally, being asked to sit as a foreign-law tribunal for the property phase of its own proceeding.
Where the spouses hold different nationalities, on the other hand, Section 22 defaults to the husband’s nationality, an openly gendered rule that has never been repealed. Beyond the obvious fairness and public-policy questions it raises, it is also a live drafting hazard: which spouse counts as “the husband” for these purposes in a same-sex marriage recognized abroad is entirely unaddressed by the text, and untested.
This gap has grown more conspicuous since Thailand’s Marriage Equality Act took effect in January 2025. That law rewrote over sixty sections of the Civil and Commercial Code, replacing “husband and wife” with the gender-neutral “spouses” throughout Thailand’s domestic marriage and property provisions. The 1938 Conflict of Laws Act, however, is a separate statute, and it was not part of that amendment. Section 22 still refers in terms to “the husband” and “the wife.” The result is an odd mismatch: Thailand’s substantive family law is now gender-neutral, but the private international law statute that decides which country’s property regime applies to a mixed-nationality marriage has not caught up, leaving the same-sex, different-nationality case genuinely open.
Practitioners advising in this space should treat the “what law governs our property” question as a threshold inquiry to be resolved before any settlement architecture is built, not as an afterthought to be handled once the Thai forum has already been chosen.
The Practical Trap: Proving Foreign Law
Even where Section 22 clearly calls for a foreign property regime, the doctrine and the courtroom outcome often diverge, because of Section 8. If the foreign law that should govern is not proved to the court’s satisfaction, Thai internal law applies instead.
This is, in practical terms, probably the most consequential provision in the entire framework for this category of case, and the one least discussed. Unless the applicable foreign matrimonial-property law is affirmatively pleaded and proven, typically through expert evidence and certified extracts of the foreign code, a Thai court will simply default to Sin Somros/Sin Suan Tua analysis under its own Civil and Commercial Code, even in a case where Section 22 formally required something else. Most published commentary never surfaces this point, because most of it is written around the mixed Thai-foreign couple, where Thai law was always going to apply anyway.
For the foreign-foreign case, this is the single highest-leverage procedural step. A party who wants their national property law applied has to build the evidentiary record for it from the outset. The statute does not do the work automatically.
This is not just a theoretical risk. In Supreme Court Decision No. 1950/2529 (1986), two Vietnamese nationals asked a Thai court to order a district registrar to register their marriage. Sections 10 and 19 of the Conflict of Laws Act send questions of marital capacity and the conditions for marriage to the parties’ law of nationality, Vietnamese law in that case, but neither side actually proved what Vietnamese law required. The Supreme Court held that the burden of proving foreign law does not rest on the petitioner alone, and since nobody had established the content of Vietnamese law, the Civil and Commercial Code governed by default under Section 8. Because the petitioners met the CCC’s own conditions for marriage, the registration was ordered. The case has nothing to do with matrimonial property, but the mechanism is the identical one Section 22 creates for divorcing couples: a conflict-of-laws rule designates foreign law, nobody proves its content, and Thai domestic law quietly fills the gap.
Worldwide Assets, and Why They Don’t All Behave the Same Way
Even once the governing property law is settled, a worldwide asset base still causes trouble, and not the same trouble three times over. Real estate, financial assets, and Thai land held through local structures each create a different problem inside a single Thai proceeding.
Real estate abroad is the cleanest case to explain. Section 22’s own proviso carves it out of the nationality rule entirely: land and buildings are always governed by the law of the place where they sit, regardless of what governs the rest of the marriage. A couple with real estate in three countries is, in principle, subject to three separate bodies of property law for those assets alone, all analyzed inside one Thai courtroom, by a judge who is not an expert in any of them.
Movable assets are quieter but no less real a problem. Bank accounts, brokerage holdings, cryptocurrency, and shares in foreign companies nominally follow the Section 22 nationality rule, but characterizing an asset correctly in a Thai judgment does not move it, freeze it, or transfer title to it anywhere. A Thai court order is a domestic instrument. It has no automatic reach over an account or a shareholding sitting in another country’s registry.
Then there is Thai real estate held through nominee or corporate structures, which tends to be the messiest of the three. Because foreign nationals generally cannot hold Thai land directly, real estate acquired during the marriage is often held through a Thai company, a long-term lease, or a nominee arrangement. That layers Land Code and Foreign Business Act exposure on top of, and often in tension with, the matrimonial-property characterization exercise. An asset the spouses treat as theirs may, on paper, belong to a third party entirely, with its own independent legal risk that exists whether or not the marriage survives.
As a general matter, Thai courts will not purport to divide property that is actually located abroad. Foreign assets must be disclosed and can be weighed in fashioning an overall settlement, but converting a paper entitlement into an actual transferred share typically requires a separate proceeding in the country where the asset sits.
The Enforcement Gap: No Safety Net at Either End
The final piece of the picture is what happens after judgment, and it may be the least appreciated risk of all.
Thailand is not a party to any multilateral treaty on the recognition of foreign divorces, so there is generally no treaty shortcut available regardless of which countries the spouses come from. More significantly, Thailand has no exequatur procedure at all. A foreign judgment presented in Thailand is treated as mere evidence in a fresh Thai lawsuit, and, absent a treaty or statute directing otherwise, a Thai court is formally free to revisit the merits from scratch. The same logic runs in the other direction: a Thai divorce or property judgment is not self-executing abroad. Each country where an asset is located will apply its own domestic recognition procedure, examining independently whether the Thai court had proper jurisdiction, whether the judgment is final, and whether it offends that country’s own public policy, before it will touch a bank account, a share register, or a land title within its borders.
The result is a structural trap for the unwary. A party can obtain a complete, carefully reasoned Thai judgment covering a global estate, and still need to relitigate recognition, asset by asset, country by country, under standards a Thai court had no occasion to consider, and which may reopen questions the Thai proceeding thought it had settled.
That said, the practice is a little less bleak than the absence of a formal mechanism suggests. Thailand has no treaty obligation to recognize foreign judgments, but Thai courts have nonetheless given effect to them in a small, consistent line of cases stretching back to the early twentieth century, most recently Supreme Court Decision No. 6565/2544 (2001), by invoking the doctrine of international comity. The party relying on a foreign judgment still has to bring a fresh Thai lawsuit, but Thai courts assessing that judgment have tended to focus on whether the foreign court had proper jurisdiction, whether the judgment is final, and whether enforcing it would amount to relitigating a settled matter, rather than reopening the substantive merits from first principles. Comity is a judicial practice rather than a statutory right, so it guarantees nothing in an individual case, but it does mean the enforcement gap is narrower in practice than the bare absence of an exequatur statute implies.
Renvoi and Public Policy
Two loose ends in the statute are worth flagging before turning to practice.
One is renvoi: the situation where Thai conflict-of-laws rules point to a foreign country’s law, but that country’s own conflict-of-laws rules point the question somewhere else again. Section 4 of the Act accepts a limited form of it: where the foreign law that should govern would itself refer the matter back to Thai law, Thai internal law applies rather than Thai conflict-of-laws rules. The Act is silent on what happens where the foreign conflict rule points onward to a third country’s law, a genuine gap that has not, to this author’s knowledge, been authoritatively resolved.
The other is public policy. Foreign law is applied only to the extent it is not contrary to Thai public order or good morals (Section 5). This is a broad and largely undefined safety valve, and it gives a Thai court a ready basis to decline to apply an unfamiliar or unpalatable foreign property regime even where Section 22 would otherwise require it, adding a further layer of unpredictability to outcomes that, on paper, look statutorily determined.
Practical Implications for Counsel
A few habits follow from all of this for anyone actually running one of these files.
Resolve the choice-of-law question first, in writing, before building any settlement architecture. Do not assume Thai property law applies simply because the case happens to be in a Thai court.
Treat proof of foreign law as its own evidentiary project, not an afterthought. Engage foreign-law expert evidence early if a client’s national property regime is going to be relied on, given Section 8’s default to Thai law absent adequate proof.
Plan for asset-by-asset, country-by-country enforcement from the outset, rather than treating the Thai judgment as the end of the matter. Where finality is a client priority, coordinate the Thai proceeding with a parallel recognition strategy in every jurisdiction where a material asset sits. Thailand’s lack of an exequatur mechanism and its absence from the relevant treaty framework mean no single judgment will travel automatically.
Before Dividing Worldwide Assets, Know Which Law Applies
The conventional wisdom that a Thai divorce means Thai property law is true often enough, for the mixed Thai-foreign couple, to have become the default assumption in most practitioner commentary. For the growing population of foreign-foreign couples divorcing in Thailand with assets spread across several countries, that assumption is frequently wrong as a matter of law, and the gap between the formal conflict-of-laws answer and the practical courtroom outcome is exactly where cases go astray. Getting the choice-of-law analysis right at the outset, and planning enforcement as a distinct, multi-jurisdictional project rather than a formality, is not a refinement on top of the divorce strategy. For this category of case, it is the divorce strategy.
This article addresses Thailand’s Act on Conflict of Laws, B.E. 2481 (1938), and general principles of Thai private international law as they apply to divorce between foreign nationals. It is intended as a general overview of a developing area of practice and does not constitute legal advice on any specific matter. For advice on a specific case, please contact Formichella & Sritawat.
