Methodology
How we vet what Thaissistant knows
Most advice about Thailand online is a screenshot of a screenshot: a forum post citing a Facebook comment citing a rumor. Thaissistant is built the other way up — from the law and the bodies that enforce it, down to a plain-language answer you can check.
The trust ladder
The law itself: acts and regulations as published in the Royal Thai Government Gazette (ราชกิจจานุเบกษา) and the consolidated statutes maintained by the Office of the Council of State. When an entry states a rule, this is where the rule comes from.
A government body stating its own rules and procedures: the Immigration Bureau on extensions, the Revenue Department on tax, the Department of Land Transport on licences. Authoritative for how the law is applied in practice.
English translations published by a Thai authority. Thai law is authoritative only in Thai — official translations are reliable guides, and our entries say when a translation is unofficial.
Reputable secondary sources — established law firms, chambers of commerce, embassy guidance — used sparingly, always labelled, never as the sole basis for a rule.
What we never treat as a source
- Facebook groups, Reddit threads, forum posts — however confident they sound
- Blogs written for search engines rather than readers
- A model's training data on its own — every legal claim must trace to a citation
- Anyone's 'my friend at immigration said'
How an entry is built
- 1
Each entry states stable facts, names its legal basis, and links every source with the date we last checked it.
- 2
Anything that moves faster than we can verify — fees at a specific office, an officer's discretion, transition-period practice — is marked 'verify live' instead of stated as fact.
- 3
When the law and street-level practice differ, the entry says so explicitly rather than pretending the gap doesn't exist.
- 4
Entries carry the date their facts were last verified. If something looks out of date, tell us: hello@thaissistant.com.
Bodies we currently cite
- Royal Thai Government GazettePrimary law
- Office of the Council of State text hosted by Office of Transport and Traffic Policy and Planning (Ministry of Transport)Primary law
- Office of the Council of State text hosted by Department of LandsPrimary law
- Office of the Council of State text hosted by the Senate of ThailandPrimary law
- Department of Health Service Support, Ministry of Public HealthPrimary law
- Office of the Council of StatePrimary law
- Ministry of Labour (Government Gazette text hosted by Department of Employment)Primary law
- Office of Insurance Commission (document service)Primary law
- Royal Thai Government Gazette (copy hosted by Ban Phet Municipality)Primary law
- Bank of ThailandOfficial source
- Department of LandsOfficial source
- Ministry of Foreign Affairs of ThailandOfficial source
- Samut Prakan Immigration Office, Immigration BureauOfficial source
- Royal Thai Government (thailand.go.th)Official source
- Bureau of Registration Administration, Department of Provincial AdministrationOfficial source
- The Secretariat of the SenateOfficial source
- Office of Insurance CommissionOfficial source
- Department of Disease Control, Ministry of Public HealthOfficial source
- Immigration Division 1, Immigration BureauOfficial source
- Board of Investment (BOI)Official source
- Department of Land TransportOfficial source
- Tourist Police Bureau, Royal Thai PoliceOfficial source
- Immigration BureauOfficial source
- Royal Thai Consulate-General, Ho Chi Minh CityOfficial source
- Royal Thai Police, Information DivisionOfficial source
- Tha Yang Subdistrict Municipality (Phetchaburi)Official source
- Department of Provincial AdministrationOfficial source
- Excise Department (legal division knowledge management)Official source
- Bureau of Law, Secretariat of the House of RepresentativesOfficial source
- Royal Thai Government portal (thailand.go.th)Official source
- Department of Marine and Coastal ResourcesOfficial source
- Royal Thai Embassy, SingaporeOfficial source
- Tourism Authority of Thailand (TAT Newsroom)Official source
- Royal Thai Consulate-General, Los AngelesOfficial source
- Royal Thai Embassy, Washington D.C.Official source
- Ministry of Foreign Affairs (Royal Thai Embassy, Tokyo)Official source
- Department of Business Development, Ministry of CommerceOfficial source
- Office of the Consumer Protection Board (hosted by Tha Yu Municipality)Official source
- Department of Consular Affairs, Ministry of Foreign AffairsOfficial source
- Royal Thai Embassy / Ministry of Foreign AffairsOfficial source
- Ministry of Foreign Affairs, Kingdom of ThailandOfficial source
- info.go.th (Government service portal) / Department of LandsOfficial source
- Anti-Fake News Center, Ministry of Digital Economy and SocietyOfficial source
- National Institute for Emergency Medicine (NIEMS)Official source
- Ministry of Labour / Social Security OfficeOfficial source
- Department of Health Service Support (MoPH), hosted by Ministry of Foreign AffairsOfficial source
- Ministry of Foreign Affairs (Royal Thai Embassy)Official source
- Narcotics Control Division, Food and Drug Administration ThailandOfficial source
- Food and Drug Administration ThailandOfficial source
- Department of Thai Traditional and Alternative Medicine, Ministry of Public HealthOfficial source
- Royal Thai Embassy, LondonOfficial source
- Civil Aviation Authority of Thailand (CAAT)Official source
- National Broadcasting and Telecommunications Commission (NBTC)Official source
- Royal Thai PoliceOfficial source
- Samut Prakan Immigration, Immigration BureauOfficial source
- Thai Meteorological DepartmentOfficial source
- Department of Employment, Ministry of LabourOfficial translation
- The Revenue DepartmentOfficial translation
- Office of the Council of State / Royal Thai PoliceOfficial translation
- Royal Thai Police (Office of the Council of State translation)Official translation
- Board of Investment (translation prepared for DBD, Ministry of Commerce)Official translation
- Office of the Council of State / Department of Provincial AdministrationOfficial translation
- Office of the Council of State (unofficial translation, hosted by Royal Thai Police)Official translation
- Forvis Mazars ThailandReputable secondary
- Expat Tax ThailandReputable secondary
- PwCReputable secondary
- PwC Worldwide Tax SummariesReputable secondary
- UK GovernmentReputable secondary
- HM Revenue & CustomsReputable secondary
- UK Government (FCDO)Reputable secondary
- The Nation ThailandReputable secondary
- CNNReputable secondary
- The ThaigerReputable secondary
- UK Foreign, Commonwealth & Development OfficeReputable secondary
General information, not legal advice. Laws and practice change; for a decision that matters, confirm with the authority named in the sources or a licensed professional.
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