The Chiang Mai Immigration Bureau divide into 3 building to service foreigners. First, the building number 1 is Administration section. Is responsible for coordination with the other divisions, including the publishing operation. The production and gathering of documents and implementation of accounting materials. In front of this building is service for three nationality labor. There are Myanmar, Lao and Cambodia. Second, the building number 2 is Visa extension section. This section service to foreigners that entry to stay in the Kingdom of Thailand. Finally, the building number 3 is Investigation section. This section is inform foreigners who stay in Thai to resident. According to it is inquiry section.