Thailand separates the permission to enter from the permission to stay for a particular period. A visa may allow a person to travel to Thailand for a purpose, but the immigration officer normally decides the period of stay at entry. Common purposes include tourism, study, family life, retirement, business, work, and other approved activities. Each purpose can use a different visa category or immigration route, and changing the purpose may require a new application or approval. A person who wants to remain longer usually needs an extension of stay or another lawful status. An application is normally made before the current permission ends, and the immigration office may require forms, photographs, financial evidence, proof of address, or documents from a school, employer, or family member. Foreign nationals have reporting duties in some situations. These can include reporting an address, reporting long stays, or having a hotel, landlord, or householder report the foreign guest. The local name TM30 is commonly connected with address reporting by a residence provider. A visa and a work permit are different. A visa or permission to stay does not automatically give the right to work. A foreigner who works in Thailand normally needs the correct work authorization, and the job, employer, location, and activity may be limited. Overstaying can lead to fines, detention, removal, or future entry problems. Working without the required authorization can also create serious immigration and employment risks. A person should check the status shown in the passport or official record rather than rely on an old visa sticker. Re-entry is another separate issue. Leaving Thailand can affect a current permission to stay unless the person has the required re-entry arrangement or receives a new permission after returning. The practical result depends on the immigration status and the travel plan. Thai immigration procedures often involve the Immigration Bureau, local immigration offices, Thai embassies or consulates abroad, and labor authorities for work permits. Different offices may ask for different supporting documents, so preparation and early contact are important. Keep copies of your passport, visa, entry stamp, extension papers, address records, work permit, and applications. Never give false information or use someone else's documents, and ask a qualified immigration adviser when your case involves overstay, refusal, family status, or a change of purpose.
Immigration law in Thailand
Immigration law in Thailand sets the rules for entering, staying, working, and leaving the country. It uses visas, permission to stay, extensions, reporting duties, and work permits. The correct step depends on your passport, purpose, and current immigration status.
Tip
Before traveling or changing plans in Thailand, check the exact permission stamped or recorded for your current stay. Put every reporting date and application step in a calendar with a reminder well in advance. If you plan to work, confirm work authorization separately before starting the activity.