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'Duly Serious Cause' — Strict Construction of Severance-Free Grounds
Employee v Employer (claim for severance after dismissal)
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 Do not cite it as specific case law — consult a Thai-qualified lawyer for the authoritative Dika number and current application.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
An employer dismissed an employee for breach of internal rules under Section 119(4) LPA — 'wilfully disobeying or habitually neglecting lawful orders of the employer, after a written warning' or 'serious offence committed against the work rules' — and denied severance. The breach in different reported cases ranged from minor policy infractions (lateness, dress code) to genuinely serious conduct (theft, harassment, falsifying records).
Legal Issue
What threshold of severity is required for an offence against work rules to be 'duly serious' under Section 119(4) so as to remove severance entitlement, and how the written-warning requirement operates.
Holding
The Supreme Court — Labour Division has held that 'duly serious' is an objective standard, not the employer's subjective characterisation. The court considers (i) the nature of the act, (ii) damage caused, (iii) intent or recklessness, (iv) the employee's record, and (v) whether the work rule clearly identified the offence as severance-free. For lesser offences, the prior-written-warning route (valid for one year) is mandatory, and the warning must specifically identify the conduct and consequences.
Reasoning
Section 119 is an exception to the protective default of severance. Trivial infractions cannot be parlayed into a 'serious offence' simply by labelling them so in the work rules. The written-warning regime exists to give the employee a fair chance to correct conduct; an unwarned employee cannot lose severance for repetitive minor breaches.
Significance
Defines the working line between 'fire with severance' and 'fire without severance' that all Thai HR practitioners must navigate. Misjudging the threshold is the single most common source of severance claims.
Practical Takeaway
Use the written-warning path for any borderline conduct; reserve Section 119(4) for genuine serious offences. Maintain a clear, registered set of work rules that specifies which acts are severance-free. Document everything contemporaneously.
Cited Statutes
- Labour Protection Act B.E. 2541 (1998), Sections 118, 119
- Labour Protection Act, Section 108 (work rules)
- Establishment of Labour Court and Labour Court Procedure Act B.E. 2522 (1979), Section 49
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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