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Truth Alone Is Not a Defence to Defamation — Public Benefit Required
Complainant (private individual) v Defendant (publisher / speaker)
Composite summary — not a single reported case. This entry distils a settled line of Thai Supreme Court (Dika / ฎีกา) authority for legal education. It is not a transcript of one reported judgment, and the heading is not a citable case number. Do not cite it as specific case law — consult a Thai-qualified lawyer for the authoritative Dika number and current application.
Facts
A defendant published statements about a private individual concerning matters that, while true, related to personal or private life — historical convictions, family matters, sexual behaviour, or financial difficulties. Prosecuted for criminal defamation under Sections 326 and 328 (defamation by publication) of the Penal Code, the defendant raised Section 329 (truth and public benefit) and Section 330 (proof of truth in public-interest cases).
Legal Issue
Whether truth alone is a complete defence to criminal defamation in Thailand, and how 'public benefit' under Section 329 is assessed.
Holding
The Supreme Court has consistently held that truth alone is insufficient. Under Section 329, a defendant relying on truth must additionally show that the publication served a legitimate public benefit OR was in self-defence/legitimate interest. Section 330 also restricts proof of truth where the statement relates to personal matters and there is no public benefit. Where the matter is purely private, even a true statement can ground a conviction.
Reasoning
Thai defamation law is rooted in the protection of personal honour (Sections 326–333 Penal Code), not merely in the regulation of false speech. Section 329 reflects a deliberate legislative choice to limit a 'truth' defence to matters of public concern. The court balances freedom of expression against the constitutional right to reputation and dignity.
Significance
Explains why Thai defamation law differs sharply from common-law systems where truth is an absolute defence, and why journalists, bloggers, and online commenters face genuine criminal — not merely civil — exposure even for truthful reporting.
Practical Takeaway
Before publishing critical statements about an identifiable person, evaluate not just truth but public-benefit framing. Keep contemporaneous evidence of sources and editorial process. Add the Section 329 reasoning to the published context where the matter is genuinely of public concern.
Cited Statutes
- Penal Code, Sections 326–333
- Penal Code, Section 329 (exemptions: good faith, self-defence, public benefit)
- Penal Code, Section 330 (proof of truth — restrictions for private-life matters)
- Constitution of the Kingdom of Thailand B.E. 2560 (2017), Section 34 (freedom of expression)
This entry summarises a representative line of authority from the Thai Supreme Court (ฎีกา). It is intended for general legal education only and is not a substitute for advice from a Thai-qualified lawyer. Individual Dika case numbers are being verified against primary sources; until then these entries are presented as composite doctrinal summaries.
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