Many foreign nationals arrive in Thailand from countries where freedom of expression is broadly protected and where a truthful review or social media post is generally treated as fair comment. Thailand approaches some of these issues differently — and the consequences of getting it wrong can include criminal prosecution, a fine, imprisonment and immigration complications.
This guide explains how Thai defamation law works in practice, what the Computer Crimes Act adds on top of it, what lèse-majesté means for online conduct, and how foreign nationals can protect themselves while still expressing views responsibly.
The most common mistake: "It was true, so I can't be in trouble."
In Thailand, truth is not always an automatic complete defence to a defamation claim. Whether a defence applies depends on how the statement was published, the purpose it served and whether it was in good faith. Do not assume truthfulness alone removes legal risk.
The Legal Framework
Defamation Under the Criminal Code
Thai defamation law is contained primarily in Sections 326 to 333 of the Criminal Code. Defamation is not only a civil wrong in Thailand — it can also be a criminal offence carrying potential imprisonment. This is one of the most significant differences from many Western legal systems.
At its core, defamation involves communicating something about another person to a third party in a way that damages — or is likely to damage — their reputation. The Thai Criminal Code distinguishes between:
- Verbal defamation (statements made orally);
- Written or published defamation, including through newspapers, broadcast, digital media and other channels — which is treated as a more serious category under Section 328.
Written or electronically published defamation — including social media posts, online reviews and messages — carries heavier maximum penalties than oral defamation under Thai law.
Criminal Penalties
A person convicted of defamation under the Criminal Code can face imprisonment of up to one year, a fine of up to 20,000 baht, or both. Published or broadcast defamation (Section 328) carries imprisonment of up to two years and a fine of up to 200,000 baht. These are criminal penalties — not civil damages.
Civil Liability Runs Alongside Criminal
A defamation complaint can produce both criminal and civil consequences simultaneously. A victim may file a police complaint under the Criminal Code and also pursue a civil claim for compensation. Being acquitted of the criminal charge does not automatically remove civil liability, and the standards of proof differ between the two processes.
The Computer Crimes Act — Online Defamation
The Computer Crimes Act B.E. 2550 (2007), as amended, adds a further layer on top of the Criminal Code. Section 14 of the Computer Crimes Act makes it an additional offence to import into a computer system false information likely to cause damage to a third party, or to import into a computer system false information likely to damage national security or cause public panic.
In practice, Section 14 has been used in cases involving online posts, social media content, WhatsApp messages, LINE messages, emails and other digital communications. The penalties under Section 14 can be significant — up to five years imprisonment and substantial fines in some categories.
A single social media post can potentially create exposure under both the Criminal Code and the Computer Crimes Act simultaneously.
A complainant may file under both statutes. The Computer Crimes Act route is sometimes used because it provides investigators with broader powers to obtain evidence from electronic systems and service providers. Do not treat online content as categorically safer than printed words.
Is Truth a Defence?
The Thai Criminal Code does provide a truth defence, but it is conditional — not absolute. Section 329 sets out circumstances in which a person is not liable for defamation. These include where the expression was made in good faith for the public benefit, for the protection of a lawful interest, as fair comment on a matter of public interest, or as a complaint to the competent authority.
Critically, the court will look at the purpose of publication, the manner of publication and whether the statement genuinely served a legitimate interest — not merely at whether the underlying facts were accurate. A statement that is factually true but published with an intent primarily to damage rather than to inform a legitimate public interest may not attract the benefit of the defence.
The Truth Defence Is Not Automatic
Do not assume you can avoid all legal risk simply because everything you posted was factually accurate. How the statement was made, to whom, for what purpose, and in what manner can all affect whether the defence applies.
A calm, factual account of a personal experience is in a very different position from a post whose primary function is to embarrass or destroy a particular person.
Reviews, Posts and Online Arguments
Leaving Online Reviews
Online reviews are part of everyday life. Most reviews of hotels, restaurants, businesses and services never cause legal problems. A balanced, factual account of a genuine personal experience is in a very different legal position from a post built around unproven accusations, personal insults or exaggerated claims.
Before posting any review, consider:
- Is this based on your own first-hand experience?
- Are you describing verifiable facts rather than assumptions about motive?
- Can you support what you are saying if required to do so?
- Have you removed emotional language and personal insults?
- Would you be comfortable explaining this account to a judge if the matter became contentious?
Removing emotional language often makes a review more persuasive, not less. Describing what actually happened is more useful and far safer than characterising someone's character or intentions.
Example Contrast
Lower Risk
"The air-conditioning did not work during my three-night stay. I reported it twice and it was not repaired."
Higher Risk
"This hotel is run by thieves who deliberately target tourists and steal from them."
The first describes an experience. The second makes a criminal allegation — theft — that requires evidence to support and may attract the attention of the business owner's lawyer.
Social Media Arguments
Online disagreements escalate quickly. A minor dispute in a Facebook group can become hundreds of comments within hours. Screenshots spread. People forward content to others. The original audience for a message is rarely the final audience.
Deleting a post does not remove it from existence. Screenshots taken by others may already exist and may have been forwarded widely. Do not assume deletion removes legal exposure after the fact.
The safest general rule for online arguments: if you would not say it directly to the person's face in front of a judge, do not write it online.
Private Groups and Messaging Apps
A statement made in a private Facebook group, a LINE group, a WhatsApp chat or a condominium residents' group is not necessarily protected from legal consequences by virtue of its privacy settings. The question is whether it was communicated to a third party — and private groups typically have multiple members.
Messages from private chats are regularly produced as evidence in Thai court proceedings. Screenshots and digital forensics are used routinely by police investigators and by opposing lawyers. Do not assume that "private" means legally untouchable.
Accusing Individuals of Criminal Conduct
Accusing an identifiable individual of fraud, theft, dishonesty, criminal behaviour or other serious wrongdoing in an online post carries substantially more legal risk than expressing dissatisfaction with a service experience.
Where you genuinely believe criminal conduct has occurred, the appropriate step is to report the matter to the police or relevant authority — not to conduct a public investigation on social media. A police complaint is both protected and more likely to produce an actual result.
Threatening to Expose Someone Online
Using the threat of a public post or negative review as leverage — for example, demanding a refund while threatening public exposure if refused — can itself create legal problems. Statements such as:
- "If you don't refund me I'll post everything online."
- "I'll tell everyone exactly what you've done."
- "I'm going to destroy your business with reviews."
can potentially be characterised as extortion or blackmail rather than the exercise of a legitimate consumer right, depending upon the circumstances. Where a genuine dispute exists, resolving it directly or through the proper legal channels is safer than using publicity as a threat.
Bloggers, Content Creators and Journalists
Those who publish regularly — through a website, YouTube channel, podcast, newsletter or social media platform — are not exempt from Thai defamation law by virtue of calling themselves bloggers or journalists. There is no formal press exemption in Thailand of the kind that exists in some other jurisdictions.
Publishing to a larger audience amplifies the reach of a defamatory statement and can increase the severity of the consequences. Allegations that are serious — fraud, criminal conduct, misconduct — should be fact-checked, supported by evidence and ideally accompanied by an opportunity for the person concerned to respond before publication.
Forwarding Rumours
Forwarding or sharing content created by someone else does not automatically insulate you from legal liability. Where a defamatory post or message is forwarded to new audiences, the person who forwarded it may face their own exposure depending upon the circumstances.
Before sharing information, ask:
- Do I actually know this to be true?
- Where did it originally come from?
- Can I identify the original source and verify it?
- Would I be comfortable if my name appeared beside every copy of this content?
Satire, Jokes and Memes
Humour does not remove legal liability in Thailand. A meme or satirical post making a factual allegation against an identifiable person — even one framed as a joke — can still be treated as defamatory if it conveys a damaging factual assertion. The internet strips away tone and context. What the author intended as obvious satire may be read by others as a factual statement.
Recordings and Private Messages
Recording Conversations
Whether a recording can be lawfully made and used as evidence depends upon the circumstances. Important distinctions include:
- Recording a conversation you personally participate in — you are a party to the communication;
- Secretly recording a conversation between other people in which you take no part;
- Installing recording equipment in a location where there is a reasonable expectation of privacy;
- Recording in a public place where no expectation of privacy exists.
Even where a recording is made in circumstances that may be permissible, the use of that recording — particularly publishing it online — is a separate question. Publishing a private conversation without consent can create additional legal exposure regardless of how the recording was obtained.
On Using Recordings as Evidence
Original, unedited recordings generally carry far more evidential value in Thai court proceedings than edited clips. Never manipulate, selectively cut or alter a recording in a way that could misrepresent what was said. Edited recordings can undermine your own position and can themselves become the subject of a criminal complaint.
Publishing Private Messages
Receiving a private message does not automatically give you the right to publish it wherever you choose. Sharing private communications — WhatsApp, LINE, email, Messenger, SMS — publicly can create complications under Thai law including potential privacy and Computer Crimes Act issues, separate from defamation.
Before sharing private messages publicly, ask whether doing so is genuinely necessary or whether the same purpose can be achieved without publishing private communications. In many situations it is possible to describe what happened without broadcasting the original messages.
The Impact on Visa and Immigration Status
A criminal complaint arising from online activity — whether filed under the Criminal Code or the Computer Crimes Act — is a criminal matter in Thailand. Depending upon the severity of the case and the outcome, criminal proceedings can have consequences for visa status and future immigration applications. This is one of the reasons that approaching online communication with care makes practical sense beyond the immediate legal risk.
See the Deportation Risks guide for the immigration consequences of criminal conduct in Thailand.
Lèse-Majesté — Section 112
Criticism of the Monarchy
This is not an area for experimentation, humour, satire or online debate. Foreign nationals have been prosecuted and convicted under Section 112. Sentences can be severe.
Section 112 of the Thai Criminal Code makes it a criminal offence to defame, insult or threaten the King, the Queen, the Heir Apparent or the Regent. The offence carries a penalty of three to fifteen years imprisonment per count. Multiple counts can be charged for a single piece of content.
It Applies to Foreign Nationals
Section 112 applies to all persons within Thai territory regardless of nationality. Foreign nationals have been investigated, arrested and convicted.
It Applies to Online Content
Online content — posts, comments, images, videos, shares and shares of other people's content — can constitute the offence if the content is accessible within Thailand. Content published from outside Thailand but accessible in Thailand has been the basis of investigations.
It Applies to Sharing and Forwarding
Sharing, liking, commenting on or forwarding content that falls within Section 112 can itself constitute an offence, depending upon the circumstances. Do not assume you are protected because you did not create the original content.
It Is Actively Enforced
Complaints under Section 112 can be filed by any member of the public, not only the individuals directly concerned. Enforcement has historically varied in intensity but the law remains fully in force.
The Only Safe Approach
Do not make any comment — written, verbal, visual or implied — that could be construed as negative, insulting, threatening or disrespectful toward the institution of the monarchy. This applies online and offline, in public and in private, in English and in any other language.
If you are unsure whether something crosses this line, do not publish it.
If a Problem Arises
If You Receive a Legal Letter or Police Contact
Do not ignore a legal letter, a formal demand or a police summons. In Thailand, ignoring a criminal complaint does not make it go away — it can result in an arrest warrant being issued. Early legal advice is significantly better than dealing with the problem after a warrant has been issued or charges have been filed.
- Do not make further posts about the matter while a complaint is pending.
- Do not contact the complainant directly without legal advice.
- Do not delete content you have already published — deleted content can still be recovered and deletion itself can sometimes complicate matters.
- Gather and preserve your own evidence — original posts, timestamps, message threads.
- Seek qualified legal advice from a Thai lawyer as soon as possible.
- Contact your embassy if you are arrested or detained.
If Your Own Reputation Has Been Damaged
Where false information has been published about you — damaging your reputation, harming your business or causing identifiable loss — you may have a legitimate defamation claim. The same legal framework that protects others applies in your favour.
Act promptly. Preserve evidence — screenshots, links, dates, timestamps, download originals — before content is deleted. A Thai defamation claim has limitation periods and gathering evidence before content disappears is important. Obtain legal advice early to assess the strength of the claim and available remedies.
The Pre-Posting Checklist
Before publishing anything online — review, post, comment, share or forward — ask five questions:
Five Questions Before Every Post
Is it true — do I actually know this to be accurate from my own knowledge?
Can I support it — do I have evidence that would withstand scrutiny?
Is it fair — am I describing what happened rather than guessing at motive?
Is it necessary — does this serve a genuine purpose beyond the impulse to vent?
Would I say exactly the same thing directly to the person's face?
If the answer to any of these questions is no, pause before posting. Many defamation proceedings have started from content that took seconds to write and years to resolve.
Practical Guidance
Everyday Social Media — Risk Reduction
Describe your own experience in factual terms — do not speculate about motives or make unproven allegations.
Remove insults and emotional language before posting. Calm descriptions are both more persuasive and legally safer.
Do not name individuals and accuse them of criminal conduct in public posts — report suspected crime to the authorities instead.
Do not use the threat of a public post as leverage in a dispute — this can be characterised as extortion.
Do not assume a private group or messaging app protects you legally — screenshots travel.
Do not post in anger. Write the post, wait 24 hours, then decide whether to publish.
If in doubt about whether content might be defamatory, take legal advice before posting — not after.
Computer Crimes Act — Things to Know
The Computer Crimes Act applies to online posts, social media, WhatsApp, LINE, email and other digital communications.
Section 14 penalties can exceed those under the Criminal Code defamation provisions alone.
Investigators can compel service providers to disclose account information and content under the Computer Crimes Act.
A single post can create exposure under both the Criminal Code and the Computer Crimes Act simultaneously.
Encrypted messaging does not guarantee privacy from legal process where a criminal complaint is filed.
Absolute Rules — No Exceptions
Never make any statement — written, spoken, visual or implied — that could be construed as negative, insulting or disrespectful toward the institution of the monarchy.
This applies online and offline, in public and in private, in English and any other language.
Do not like, share, forward or comment on content that could fall within this category.
Do not test the boundaries through satire, jokes or indirect references.
If you are uncertain, do not publish.
In Summary
Key Points to Remember
Thai defamation is both a criminal offence and a civil wrong — the potential consequences include imprisonment, not merely damages.
Published or electronically distributed defamation (Section 328) carries heavier penalties than verbal statements.
Truth is not always an automatic complete defence — the purpose and manner of publication also matter.
The Computer Crimes Act adds a further criminal layer on top of the Criminal Code for online content, with serious penalty provisions.
A single online post can generate simultaneous exposure under both the Criminal Code and the Computer Crimes Act.
Private Facebook groups, WhatsApp chats and LINE messages are not exempt — screenshots are regularly used as evidence.
Threatening online exposure as leverage can constitute extortion depending on the circumstances.
Forwarding or sharing defamatory content created by others can itself create legal exposure.
Section 112 (lèse-majesté) carries sentences of three to fifteen years per count and applies to all persons in Thailand.
If you receive a legal letter or police summons, act immediately — do not ignore it.
Early legal advice is far less costly and disruptive than dealing with criminal proceedings after the fact.
Legal Basis and Authoritative Sources
This guidance has been prepared with reference to the following authoritative sources:
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