Warnings and fair discipline: doing it right in Thailand
A written warning is a legal building block, not just a telling-off. Done properly it gives the employee a fair chance to fix things and gives the employer the documented basis it needs if the issue continues.
The quick version
A warning isn't just a telling-off — in Thai labour practice it's a legal building block. Done properly (written, specific, signed), a warning protects everyone: it gives the employee a fair chance to fix things, and gives the employer the documented basis it needs if the issue continues.
What the law says
- For an employer to later dismiss for repeated misconduct without severance, there generally needs to be a valid written warning on file first.
- A written warning stays valid for one year from the date of the offence. After that it can't be used to justify a no-severance dismissal.
- Some serious acts (dishonesty, intentional damage, gross negligence causing serious loss, 3+ days' unexplained absence) can justify dismissal without a prior warning.
- Discipline must be applied consistently and the facts must be real — a paper warning created to justify a decision already made will not hold up.
Both sides
For employees
- A warning is a chance to correct course — read it, and if you disagree, you can note your side before signing.
- Signing usually means "I received it," not "I agree." Ask for a copy.
- Warnings expire after a year. One mistake doesn't follow you forever.
For employers
- Make warnings specific: what happened, when, which rule, what must change, by when.
- Keep it factual and unemotional. Have the employee sign for receipt; if they refuse, note it with a witness.
- Apply rules consistently across staff — selective enforcement is a common reason warnings get thrown out.
Myths & gray areas
- "Three warnings and you're automatically out." There's no magic number in law. "Three strikes" is a company policy, not a legal rule.
- "Refusing to sign cancels the warning." No. The employer can record the refusal with a witness; the warning still stands.
- "Old warnings never expire." They effectively do — roughly one year for the purpose of a no-severance dismissal.
What good looks like
The point of a warning isn't to build a case to fire someone — it's to give a fair chance to improve, with a clear record if it doesn't work out. Have the conversation in person first, then put it in writing. Be specific, be consistent, and keep the door open. Most staff turn it around when they understand exactly what's expected. That's better for the team, cheaper for the business, and the kind of workplace people don't quit.
Sources
Plain-language summary, not legal advice.
Laws and figures change. For your situation, confirm with the source or a licensed Thai lawyer. Department of Labour Protection & Welfare hotline: 1506. Disputes can go to the Labour Court.
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