Double Jeopardy in Thailand: Dika 889/2569 Explained

Last updated on September 14, 2026

Double jeopardy in Thailand does not work the way most foreigners assume. In September 2026 the Supreme Court published Dika 889/2569, holding that a criminal conviction handed down by a foreign court does not stop Thai prosecutors from charging the same person, for the same acts, all over again in Thailand. The defendant had already been convicted in Bahrain and given a suspended sentence — and still received 18 months of imprisonment from the Thai courts. For expats and Thai nationals who move between jurisdictions, this decision is essential reading.

This article explains what the Supreme Court decided, how the rule against repeated prosecution actually operates under Thai law, and what protection — if any — a foreign judgment gives you inside the Kingdom.

What Happened in Dika 889/2569

The defendant, a Thai national living in Bahrain, forged a series of documents — an investor visa cancellation certificate, company meeting minutes, and signatures on promissory notes — and used them to obtain money from a Thai victim. Bahrain prosecuted her first. The Bahrain Court of Appeals sentenced her to one year of imprisonment, suspended for three years, and Bahrain’s highest court upheld that ruling.

Thailand then prosecuted her for the same conduct, relying on Sections 264, 266(4) and 268 of the Penal Code (forgery and use of forged documents). Her defence raised two arguments: first, that the Bahraini conviction extinguished Thailand’s right to prosecute under Section 39(4) of the Criminal Procedure Code; second, that the suspended sentence in Bahrain should count as punishment already served, barring any further penalty in Thailand.

The Supreme Court rejected both arguments and imposed 18 months of imprisonment across three counts. The full decision is published in the Supreme Court decision database (Dika 889/2569).

Double Jeopardy in Thailand: The Legal Framework

The rule most people call double jeopardy in Thailand is found in Section 39(4) of the Criminal Procedure Code: the right to bring a criminal prosecution is extinguished when there has already been a final judgment on the merits for the same offence against the same person. Thai courts apply this rule strictly — we explained its domestic operation in our article on withdrawing a criminal complaint in Thailand.

Dika 889/2569 confirms the rule’s most important limit: Section 39(4) applies only to judgments of Thai courts. The Supreme Court reasoned that allowing a foreign judgment to extinguish Thailand’s right to prosecute would amount to surrendering Thai judicial sovereignty to a foreign state. A conviction in Bahrain, France, Australia or anywhere else is simply not a “final judgment” for the purposes of Section 39(4).

The consequence is stark. A person who has been through a full criminal trial abroad, up to the foreign supreme court, can face a second full prosecution in Thailand for exactly the same facts — as long as Thai criminal law reaches those facts.

When Thailand Can Prosecute Crimes Committed Abroad

Thai criminal jurisdiction is primarily territorial, but the Penal Code extends it beyond the border in defined situations:

• Section 7 — certain offences committed entirely abroad can always be punished in Thailand, including offences against national security and, under Section 7(2), forgery-related offences such as those in Dika 889/2569.
• Section 8 — general offences committed abroad by a Thai national (where the victim or the foreign government requests punishment), or against a Thai victim, can be prosecuted in Thailand on request.
• Section 9 — offences committed abroad by Thai officials in the course of duty.

Foreigners resident in Thailand should note that these rules cut both ways. A foreigner who commits an offence abroad against a Thai victim can, on the victim’s request, be prosecuted in Thailand when they set foot in the Kingdom. Anyone in that position should understand how criminal trials work in Thailand and what happens when a foreigner is arrested in Thailand.

Credit for Sentences Served Abroad

Thai law is not entirely without protection for people already judged abroad. Section 10 of the Penal Code deals with offences committed outside Thailand that are punishable in the Kingdom under Sections 7(2), 7(3), 8 or 9. For those offences, a person shall not be punished again in Thailand if a foreign court delivered a final acquittal, or if the person was convicted and has already served the sentence in full. Where the sentence was only partly served, the Thai court may reduce the Thai penalty accordingly.

This is where the defendant in Dika 889/2569 lost her second argument. Her Bahraini prison sentence was suspended — she never spent a day in custody. The Supreme Court held that a suspended foreign sentence is not punishment served, so the protection against a second punishment never engaged. The Thai court remained free to impose its own sentence in full.

Outcome abroad	Effect in Thailand (extraterritorial offences)
Final acquittal by a foreign court	No punishment again in Thailand (Penal Code s.10)
Convicted, sentence fully served	No second punishment in Thailand (Penal Code s.10)
Convicted, sentence partly served	Prosecution possible; Thai court may reduce the penalty
Convicted, sentence suspended (no time served)	Prosecution possible; no credit — full Thai penalty (Dika 889/2569)
Final judgment of a Thai court	Prosecution barred — CPC s.39(4) double jeopardy

What This Means for Expats

First, a criminal file abroad does not stay abroad. If your conduct touches Thailand — a Thai victim, a Thai company, forged documents used in Thailand — the case can follow you here, even years later and even after a foreign court has closed it. The absence of double jeopardy in Thailand for foreign judgments means the foreign verdict is, at best, a sentencing consideration.

Second, the form of the foreign outcome matters enormously. A full acquittal or a fully served sentence protects you from a second punishment for extraterritorial offences; a plea deal that ends in a suspended sentence, probation or a fine may leave you fully exposed in Thailand. This should be weighed before accepting any negotiated outcome abroad when the facts have a Thai connection.

Third, this decision sits alongside the rules on extradition from Thailand and on enforcing foreign judgments in Thailand: Thai courts consistently treat foreign decisions as evidence or context, never as binding. An overview of the substantive offences is in our guide to criminal law in Thailand.

How ThaiLawOnline Can Help

If you have been investigated, charged or convicted abroad and the facts have any connection to Thailand, our team can assess your exposure under Sections 7 to 11 of the Penal Code, deal with prosecutors and police, and represent you in court. This article was written and reviewed by Sebastien H. Brousseau, LL.B., B.Sc., based in Thailand since 2004 and running ThaiLawOnline since 2006. Contact ThaiLawOnline for a confidential consultation before you travel.

This article is general information about Thai law, not legal advice. Criminal cases turn on their specific facts; consult a qualified professional about your situation before acting.

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