Criminal matters: an overview

If you or someone you know is accused of a crime in Thailand, get a licensed Thai criminal lawyer involved at the earliest possible moment, and contact your embassy if a foreigner is in custody. This page is a map of the process, not a substitute for that call.

From arrest to court, broadly

1. Arrest or accusation. You generally have the right to be informed of the charge, to contact a lawyer and a relative, and to an interpreter.
2. Police investigation. Statements and evidence are gathered. Never sign a document you cannot read — ask for a translation.
3. Detention and bail. Bail is routinely available for many offences, though it can be refused for serious charges or flight risk.
4. Prosecutor. A public prosecutor decides whether to indict; private criminal prosecutions are also possible in Thailand.
5. Trial. Career judges, no jury, proceedings in Thai.
6. Appeal. Both conviction and sentence can generally be appealed within short deadlines.

Areas that commonly surprise foreigners

• Criminal defamation exists in Thailand — including for online posts and reviews — and is not just something you can be sued over civilly.
• Computer-related offences can apply to certain online posts and are frequently charged alongside defamation.
• Offences against the monarchy carry severe penalties — there is no safe way to test the boundaries, and it is best simply avoided entirely.
• Drug offences carry severe penalties, especially for trafficking quantities, and specific rules have shifted over recent years — always check the current status before assuming anything is settled.
• Traffic incidents causing injury or death can become criminal matters, not just insurance claims — see debt & civil claims for the civil side of an accident claim.

Victims of crime

A crime victim is not just a witness. Depending on the offence, victims may be able to join as a civil party within the criminal case to claim compensation, or pursue a standalone civil claim — see debt & civil claims.

If you are accused

Do not rely on informal assurances from anyone, including police, that a matter will “go away” without formal process. Engage a lawyer, understand the charge in writing, and treat every deadline as real.

Your rights during interrogation, in outline

• You generally have the right to remain silent, and a right not to be compelled to incriminate yourself.
• You are generally entitled to an interpreter if you do not understand Thai well enough to follow proceedings, and to have that interpretation reflected accurately in any signed statement.
• A confession or statement obtained by coercion is not supposed to be admissible — but the practical question of proving coercion after the fact is exactly the kind of issue a lawyer needs to be involved in from the earliest point possible.
• You can generally request that a lawyer or a person you trust be informed of your detention.

Two increasingly common categories

Two areas generate a disproportionate share of foreigner cases in practice, and each is significant enough to have its own dedicated guide on this site: online speech that crosses into criminal defamation or a Computer Crime Act offence, and traffic incidents where a collision causing injury or death is investigated criminally alongside any insurance claim.

Sentencing and appeals

Thai sentencing considers the offence, any aggravating or mitigating circumstances, and factors such as a guilty plea or restitution to a victim, within ranges set by the relevant statute. Both the prosecution and the defence can generally appeal a first-instance judgment on conviction, sentence, or both, within a limited window after judgment — missing that window can close off the appeal entirely, which is why understanding your deadlines in writing, immediately, matters as much as understanding the charge itself.

Compensation for crime victims

Beyond joining a criminal case as a civil party or filing a separate civil claim — see debt & civil claims — Thailand also operates a state compensation scheme for victims of certain violent crimes and for wrongly accused defendants, administered through the Ministry of Justice. Eligibility and amounts are assessed case by case; a lawyer or a victim-support unit at the relevant court can advise on whether a specific case qualifies.