Defamation Lawyer in Thailand — How to File and Defend (Complete Guide)

Defamation Cases in Thailand — A Complete Guide

Defamation cases are among the most common matters lawyers handle in the social-media era — Facebook posts, TikTok videos, Twitter/X threads, LINE messages, or remarks made in public. Under Thai law, defamation means imputing facts to another person before a third party in a manner likely to damage their reputation, expose them to contempt, or cause them to be hated.

This article summarizes the questions clients ask defamation lawyers most often — applicable law, penalties, filing procedure, limitation periods, attorney fees, evidence preservation, and defenses for accused parties — so you understand the process before deciding to litigate or respond.

Applicable Law

1. Penal Code

• Section 326 — Defamation of a natural person: imprisonment up to 1 year, fine up to THB 20,000, or both.
• Section 327 — Defamation of a deceased person (family may sue).
• Section 328 — Defamation by publication (mass media, social media, newspapers, radio, TV) — heavier penalty: up to 2 years imprisonment, fine up to THB 200,000, or both.
• Sections 329–330 — Statutory exceptions, including good-faith opinion to protect a legitimate interest and truthful statements of public concern.

2. Computer Crime Act B.E. 2550 (2007), amended 2017

• Section 14(1) — Inputting false data into a computer system causing damage: up to 5 years imprisonment, fine up to THB 100,000.
• Section 16 — Distributing images that damage another's reputation.

Online defamation cases are typically prosecuted under Section 328 of the Penal Code combined with Section 14(1) of the Computer Crime Act.

3. Civil and Commercial Code

• Section 423 — Tortious imputation; the injured party may seek civil damages.
• Sections 446–447 — Damages for harm to reputation.

Elements of the Offense

The plaintiff must prove all four elements:

1. An imputation — A statement of fact about another person.
2. To a third party — At least one person other than the speaker and the subject must hear or see it.
3. Likely to harm reputation, expose to contempt, or cause hatred — Judged by the standard of a reasonable person.
4. Intent — The speaker knew and intended to make the statement.

Insult vs. Defamation

How to File a Defamation Case (Plaintiff)

1. Preserve evidence immediately — Screenshots with date and URL, images, video, audio recordings, witnesses. Do not wait — the offender may delete the post.
2. Authenticate digital evidence — Have a lawyer certify true copies, or use a digital authentication service.
3. Consult a defamation lawyer — Confirm whether the conduct meets the legal elements and which provisions apply.
4. Choose a path — File a police report (free, slower, prosecutor may decline) or file a private criminal complaint directly in court (faster, more control, with attorney and filing fees).
5. Lawyer files the complaint — At the court of the place where the offense occurred (for online posts, the court of the plaintiff's domicile is generally available).
6. Preliminary inquiry — The court determines whether the case has sufficient grounds to proceed.
7. Trial begins — Witness examination for both sides.
8. Mediation — Courts often offer mediation; many cases settle with apology and damages.
9. Judgment — Typically 6 months to 2 years.

Combining Civil and Criminal Claims

The injured party may seek civil damages alongside the criminal case, or in a separate civil action. Recoverable damages include:

• Reputational damages — Typically THB 50,000–1,000,000 depending on the plaintiff's status and the scope of publication.
• Lost business opportunities — With concrete proof of revenue impact.
• Attorney's fees — Recoverable by the prevailing party.
• Court-ordered apology — In the same medium as the defamation.

Limitation Periods

• Criminal (§326–328) — 3 months from learning of the act and the wrongdoer; not exceeding 1 year from the act. Very short — act fast.
• Computer Crime Act §14(1) — 10 years (based on the 5-year imprisonment penalty).
• Civil (§448) — 1 year from learning of the wrong and the wrongdoer; not exceeding 10 years from the act.

Important: If the 3-month criminal limitation expires, the right to a criminal complaint is lost. Consult a lawyer as soon as possible.

Approximate Attorney Fees

• Initial consultation and case assessment: Free at Witoon Yaemplab Law Office.
• Cease-and-desist letter: THB 5,000–15,000.
• Criminal complaint §326/328: THB 30,000–80,000.
• Criminal complaint + Computer Crime Act: THB 50,000–120,000.
• Civil claim for damages: additional 10–20% of recovery.
• Cases with multiple defendants or platforms: case-by-case.

Defenses (For the Accused)

1. Deny the act — The post did not come from the defendant's account; it was hacked or impersonated.
2. Statutory exception §329 — Good-faith opinion (defending a legitimate interest, official duty, court reporting, fair comment on public officials).
3. Truth defense (§330) — The statement is true and concerns a matter of public interest, not private life. (Available where the subject is a public figure or the matter is one the public should know.)
4. Missing element — No third party heard the statement, no factual imputation, etc.
5. Statute of limitations — Filed beyond 3 months for the criminal claim.
6. Mediation — Apology, removal of the post, and damages in exchange for withdrawal of charges.

Hypothetical Case Studies (Educational)

Case 1 — Facebook accusation: Mr. A posts in a Facebook group "Mrs. B is a fund-stealing thief," without any conviction. Within 2 weeks Mrs. B captures screenshots of the post, likes, and comments, consults a lawyer, and files under §328 + Section 14(1). During trial Mr. A apologizes, deletes the post, and pays THB 200,000 in damages. The case is withdrawn.

Case 2 — Negative restaurant review: A customer posts on Google Reviews "the food is terrible, the staff are rude." The restaurant owner sues for defamation. The court finds it constitutes consumer expression protected under §329(1) — defending a legitimate interest in informing other consumers — and dismisses the case.

Case 3 — LINE family group rumor: Mrs. C shares "I heard younger D is having an affair" in a family LINE group. D sues under §326. The court rules against C — all elements met (imputation, third party, reputational harm) — fine THB 10,000 plus civil damages of THB 50,000.

Common Mistakes — Plaintiff

• Engaging in the comments before consulting a lawyer — The offender may delete the post in the meantime.
• Failing to capture screenshots with date and URL — Hard to authenticate in court.
• Letting 3 months pass — The criminal complaint right expires.
• Replying with defamatory language — Becoming a defendant yourself.
• Overstating damages — The court may not allow them, and excess filing fees are non-recoverable.

Common Mistakes — Defendant

• Ignoring the summons — Default judgment.
• Deleting the post after suit is filed — May constitute "destruction of evidence."
• Speaking with the plaintiff without a lawyer — Statements can be used against you.
• Posting a counterattack — Worsens the case.

Frequently Asked Questions

Can I sue for a post in a private LINE group?
Yes, if at least one third party in the group saw it — even a closed group counts.

If the offender deletes the post, can I still sue?
Yes, if you have screenshots and authenticated copies preserved in time.

Can I sue from abroad?
Yes, if the offender is Thai or the impact occurred in Thailand (e.g., the post was readable in Thailand).

Does posting "without naming" still count?
Yes, if a reasonable reader can identify the subject from context, photos, or details.

Can an employee sue an employer for defamation?
Yes, and you may also bring an unfair-dismissal claim in the labor court.

Can I sue someone under 18?
Yes, but the case is heard by the Juvenile Court; parents share civil liability.

Does Witoon Yaemplab Law Office handle defamation cases nationwide?
Yes — both filing and defending defamation and Computer Crime Act cases throughout Thailand. Call 081-544-0944 or LINE @toonmaster for a free initial consultation.

How to Choose a Defamation Lawyer

• Direct experience with defamation and Computer Crime Act cases
• Familiar with social media and digital evidence preservation
• Provides written, transparent fee quotations with no hidden costs
• Speaks with you directly — not through a call center
• Responds quickly — the 3-month limitation is short

Conclusion

Defamation cases involve a short statute of limitations, heavier penalties when published online, and time-sensitive evidence preservation. Consulting a defamation lawyer within 1–2 days of discovering the post helps protect your rights and improve the chances of fair compensation. For defendants, the most important rule is: do not ignore the summons and do not post counterattacks. Contact Witoon Yaemplab Law Office at 081-544-0944 or LINE @toonmaster for a free initial consultation directly with the attorney, daily 07:00 – 20:00.