Visas and immigration: the legal basics

This site is not an immigration agency — but immigration status is where many foreigners first collide with Thai law, so here is the legal skeleton. Rules change frequently: always confirm current requirements with Thai Immigration or a licensed lawyer.

Overstay: the rules with real teeth

• Overstaying your permitted stay incurs a daily fine (capped at a maximum) payable on departure.
• Longer overstays trigger re-entry bans on a published sliding scale — from one year up to ten years for multi-year overstays, and harsher treatment for those caught rather than surrendering at the border.
• Overstay is also an offence for which you can be detained; being arrested for anything else while on overstay makes everything worse.

Routine obligations people forget

• 90-day reporting: foreigners on long stays must report their address every 90 days (in person, by mail, or online when the system cooperates).
• TM30: householders and hotels must notify immigration when a foreigner stays with them; landlords who never file can cause problems for your later applications.
• Re-entry permits: leaving Thailand without one voids most single-entry extensions of stay.

Extensions and long-stay routes

Common legal bases for long stays include marriage to a Thai national, retirement (age and finance requirements), work (Non-B plus work permit), education, and newer programmes such as the Long-Term Resident visa. Each has documentary requirements that reward doing things properly the first time — and “agent shortcuts” that skip legal requirements can come back as serious problems later, including fraud allegations.

When it becomes a legal matter

• Visa refusals and blacklisting have limited appeal routes — a lawyer can sometimes help, but prevention beats cure.
• Fake visas, fake stamps or misrepresented applications are criminal matters. If an “agent” offers something that sounds like it bypasses the rules, it usually does — illegally.
• Deportation and detention at the Immigration Detention Centre involve real legal process; families should engage a lawyer and the embassy immediately.