Defamation and Social Media in Thailand: What to Know Before You Post

Short answer: In Thailand, defamation is a criminal offence, not only a civil wrong. A Facebook, TikTok, X or Instagram post that alleges facts damaging someone’s reputation can be prosecuted as defamation by publication under Section 328 of the Thai Criminal Code, punishable by up to two years’ imprisonment and a fine of up to THB 200,000. Truth alone is not always a complete defence, but good-faith fair comment is protected under Section 329. The key question is whether you are asserting a damaging fact or expressing an honest opinion.

This guide explains the Thai legal framework, recent Thai Supreme Court rulings on Facebook posts, and practical steps for individuals and businesses.

How Thai Law Defines Defamation (Section 326)

Under Section 326 of the Thai Criminal Code, a person commits defamation by imputing something to another person before a third party in a manner likely to impair that person’s reputation or expose them to contempt or hatred. The basic offence carries up to one year’s imprisonment, a fine of up to THB 20,000, or both. Three elements matter:

1. An imputation — a statement presented as fact, such as an allegation of fraud, theft or misconduct.
2. A third party — someone other than the person concerned learns of it. The Thai Supreme Court has held that the offence is complete once a third party knows the statement, even if the person defamed is unaware (Supreme Court Judgment No. 6593/2559 (2016), a case involving statements to a journalist).
3. Likely harm to reputation — assessed from the viewpoint of an ordinary reasonable reader, not the subjective feelings of the person named.

Unlike some common-law systems, Thailand treats most defamation as a criminal matter that the injured person can initiate, alongside a civil damages claim.

Insults Versus Defamation

An abusive word is not automatically defamation. In Supreme Court Judgment No. 3073/2565 (2022), the Court found that a crude insult which no ordinary person would believe as a factual allegation was not an imputation under Section 326. However, insulting someone publicly may still fall under the separate offence of insult in Section 393.

Is a Social Media Post “Publication” Under Section 328?

Section 328 imposes heavier penalties where defamation is committed through documents, images, text displayed by any means, broadcasting or other forms of public announcement. The Supreme Court has described this offence as requiring dissemination to the public at large (Supreme Court Judgment No. 418/2567 (2024)). Public posts, pages, public groups, short videos and livestreams typically fall within this category. Posts restricted to friends or private chat groups depend on the facts, and may still amount to basic defamation under Section 326 because group members are third parties

Five High-Risk Posting Habits

1. Shaming a debtor online

In Supreme Court Judgment No. 7256/2567 (2024), posting someone’s photo with text suggesting they were a cheat who would not repay a debt was held to be defamation, not good-faith comment under Section 329(1) or (3). The Court indicated that a creditor should pursue the debt through legal action instead. Businesses should use formal demand letters and court proceedings, not public shaming.

2. Framing an accusation as a question

Adding “Is it true?” does not neutralise an accusation. In Supreme Court Judgment No. 418/2567 (2024), repeated question-style posts were found to be a bad-faith attempt to avoid liability, and the poster had not verified the facts or used available complaint channels.

3. Posting repeatedly

In Supreme Court Judgment No. 2624/2567 (2024), nine Facebook posts on different dates, each asserting different facts, were treated as separate offences rather than a single act. Each post can therefore attract its own penalty.

4. Sharing someone else’s post

Sharing delivers the content to a new audience. A person who shares, particularly with endorsing comments, may be treated as publishing the statement themselves, depending on intent and context [analysis based on Sections 326/328 — no directly matching ruling located; lawyer review].

5. Edited or fabricated images

Section 16 of the Computer Crime Act B.E. 2550 (2007), as amended, separately penalises uploading to a publicly accessible system an image of another person that has been created, edited or altered so as to damage their reputation or cause humiliation: up to three years’ imprisonment and a fine of up to THB 200,000, with an exception for good-faith fair comment. Whether AI-generated images fall within “created” is a question of interpretation.

When Is Criticism Lawful? Sections 329 and 330

Section 329 exempts statements made in good faith for legitimate self-protection, by an official performing duties, as fair comment on any person or thing open to public criticism, or as fair reporting of open court or public meeting proceedings. In Supreme Court Judgment No. 406/2567 (2024), a Facebook user who criticised the appointment of a senior civil servant was protected as fair comment under Section 329(3); the Court stressed that the prosecution bears the burden of proving bad faith. That case concerned a public official, so its reasoning should not be stretched to purely private disputes.

Section 330 allows a defendant to escape punishment by proving the statement is true, but proof is prohibited where the matter is personal and proving it would not benefit the public. “It’s true” is therefore not an automatic defence in Thailand.

Does the Computer Crime Act Apply to Defamation?

Since the Computer Crime Act (No. 2) B.E. 2560 (2017), Section 14(1) on false computer data expressly excludes conduct that constitutes defamation under the Criminal Code. In Supreme Court Judgment No. 2778/2561 (2018), the Court held that conduct amounting to defamation under Section 328 was not an offence under Section 14(1) or 14(5). Online defamation of an individual is therefore primarily a Criminal Code matter, while Section 16 (edited images) and other limbs of Section 14 may still apply in specific situations.

Civil Liability for Damages

Section 423 of the Thai Civil and Commercial Code makes a person liable for damages for asserting or circulating untrue statements that harm another’s reputation, credit or livelihood, even without knowing the statement was false if they ought to have known. For businesses, this is a route to recover losses caused by false online statements.

Deadlines: The Three-Month Complaint Rule

Defamation is a compoundable offence, meaning it can be settled and withdrawn by the injured person. The injured person must file a complaint within three months of learning of the offence and the identity of the offender, otherwise the right lapses. If the injured person dies before filing, a parent, spouse or child may file instead.

Pre-Posting Checklist

• Am I stating a fact or an opinion? If a fact, can I prove every part of it?
• Am I describing my own experience rather than labelling someone a “scammer” or “fraud”?
• Have I removed unnecessary photos, full names and contact details?
• Am I hiding an accusation behind a question, emoji or “I heard that…”?
• Is there a better channel: a regulator, the company itself, or the courts?
• Would I be comfortable with a Thai judge reading this post?

Practical Example (Hypothetical)

A foreign-owned café in Bangkok receives an online review saying: “Ordered on the 5th, food arrived cold, no reply for a week. Disappointed.” That is an account of the reviewer’s own experience and is lower risk. A review saying “The owner is a criminal who steals from customers” with the owner’s photo is a factual allegation that targets a person, and carries much higher risk. Outcomes always depend on the specific facts and evidence.

Common Mistakes

• Assuming that not naming someone is safe — if readers can identify the person, risk remains [analysis — lawyer review].
• Assuming deleting a post ends the matter — the offence may already be complete once a third party has seen it.
• Responding angrily in a series of posts — each may count separately.
• Relying on truth for private matters with no public benefit.
• Missing the three-month complaint window as a victim.

What to Do If You Are Accused — or Defamed

If you are defamed: capture screenshots showing the URL, date, time, account name and engagement; record when you learned of the post and identified the poster; and seek advice before the three-month deadline on whether to file a police complaint, bring a private prosecution, or negotiate removal and an apology.

If you are accused: stop posting, preserve evidence supporting the facts and your good faith, avoid emotional contact with the complainant, and consult a lawyer before attending any police summons to assess defences under Sections 329 and 330 or a negotiated settlement.

FAQ

Can a foreigner be prosecuted for defamation in Thailand? Thai criminal law applies to offences committed in Thailand regardless of nationality. Statements made abroad raise separate jurisdiction questions, as considered in Supreme Court Judgment No. 6593/2559 (2016)

Is a negative online review illegal? Not necessarily. Honest, fact-based reviews may be protected as fair comment under Section 329(3), but exaggerated factual allegations can create liability.

Can I post about a customer who owes my company money? This is high risk. The Supreme Court has rejected good-faith protection for debt-shaming posts.

Will I also face Computer Crime Act charges? For ordinary defamation, Section 14(1) excludes it; Section 16 may apply to edited images.

Conclusion

Before posting about another person or business in Thailand, separate provable facts from accusations, use measured language, and use legal channels instead of public shaming. Honest criticism remains protected, but where the line falls depends on the facts and intent in each case.

Speak to a Thai Defamation Lawyer About Your Online Post

Whether a post has damaged your reputation or your business, or you have received a police summons over something you published, timing matters. Thai defamation complaints are subject to a short three-month window, and online evidence can disappear quickly.

Pattara Law Firm advises both complainants and accused parties in Thailand, from assessing the wording and evidence, sending takedown demand letters and negotiating settlements, to filing or defending criminal and civil proceedings. For businesses dealing with unpaid customers, we also help you pursue debts through lawful demand and litigation rather than public posts.

Every case turns on its own facts. Early advice helps you understand your options and risks before you act.

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