Immigration Act B.E. 2522 (1979), as amended
Governs visa categories, extensions of stay, residence notification and grounds of inadmissibility.
Practice area
Immigration & Foreign Nationals
Visas, work permits, residency and lawful status
Legal advice and filings on the status of foreign nationals in Thailand — visa categories, extensions, work permits, 90-day reporting, and difficult cases such as overstay, refusal and appeals.
What this practice covers
- Business, work, family, retirement and long-term visas
- Work permits and change of employer
- Extensions of stay and re-entry permits
- Overstay, entry refusal and review requests
- Permanent residence and naturalisation
- Supporting documents requiring certified translation and legalisation
How we work on your matter
- 1Review current status and immigration history
- 2Select the category with the strongest prospects on the facts
- 3Produce a tailored document checklist and verify completeness
- 4Translate and legalise foreign documents as required
- 5File the application and follow up until decision
Documents to prepare
- Passport with latest entry stamp and TM.6 where issued
- Proof of address and lawful accommodation notification
- Financial evidence or employment certification
- Civil-status documents such as marriage or birth certificates with certified translation
- Police clearance certificate where required
Points to watch
- Even one day of overstay is recorded and affects future applications.
- Requirements vary between immigration offices; verify before travelling to file.
- Never submit financial or employment documents that misstate the facts — it is an offence and leads to blacklisting.
Typical timeframe
Extensions are usually decided within weeks; permanent residence and naturalisation take years.
Timeframes are indicative only and depend on the authority, the court calendar and the completeness of your documents.
Laws that govern this matter
Summarised for general understanding only. The application of each provision depends on the facts of your case.
Royal Decree on Managing the Work of Foreigners B.E. 2560 (2017)
Governs work permits and permissible occupations for foreigners.
Nationality Act B.E. 2508 (1965), as amended
Sets the criteria for Thai nationality and related permanent-residence considerations.
Example situations and how they are handled
These are constructed examples used to explain procedure. They are not client matters, and no outcome is implied or guaranteed.
Illustrative scenario: extension refused over financial evidence
Situation: The applicant meets the amount but not the required seasoning period.
Usual approach: Verify seasoning rules and evidence format before the filing date and allow time for bank letters; document practice varies between immigration offices. (Hypothetical.)
Advice for your specific situation
Long-stay foreign residents
- Never overstay even by a day — it affects future applications.
- Keep arrival cards, residence notifications and receipts — they are often requested later.
Employers hiring foreign staff
- Keep the work-permit position aligned with actual duties to reduce inspection risk.
- Prepare company documents in advance — financial statements and tax filings are commonly required.
Every matter — what to do in the first 7 days
- Gather every original document in one place, keep scanned copies, and note the date you received each one.
- Write a dated timeline — the date you received a notice or learned of the event usually starts the limitation or appeal clock.
- Do not sign a settlement, debt acknowledgement or withdrawal before a lawyer reviews it — it may extinguish existing rights.
- Preserve digital evidence unaltered (full screenshots, original files, emails with headers) — edited files are easy to challenge.
This service in your province
Province pages set out the courts and authorities with jurisdiction locally, and answer the questions people in that area ask.
Frequently asked questions
Does a visa alone allow me to work?
No. Working in Thailand requires a valid work permit, which is separate from the visa.
What must be done with foreign documents?
They generally need authentication in the issuing country, translation into Thai or English, and legalisation of the translation at the Department of Consular Affairs.
Does Thailand accept Apostille yet?
Thailand acceded to the Apostille Convention on 30 June 2026, entering into force on 28 February 2027. Until then, consular and embassy legalisation remains the route.
Related services
Other practice areas
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Speak with an attorney about your matter
Tell us the facts and we will explain the options, the documents required and the realistic timeframe before you decide.