How to get Thailand citizenship

You can obtain citizenship after fulfilling the condition of permanent residence through the following procedures:
Submit an application for citizenship at the Immigration and Nationality Service in Thailand
Attach a copy of a valid passport.
Proof of residence therein the country.
A copy of the health insurance policy,
Submit a statement from the police for Clean Record of crimes.
Submit a home rental or ownership contract.
Pay the Thai citizenship fee of up to $ 1000