neither an embassy letter nor a certificate of residence, nor insurance is necessary. Just your passport and a ฿10K minimum initial deposit at Kasikorn.
A Non O in Thailand does NOT require health insurance.
I CANT GET insurance from any of the 14 approved Thai health insurance companies, at any price, due to a minor pre-existing condition. They won’t even consider an exclusion.
Maybe you don’t need it to apply for a Thai retirement visa in the UK, which I doubt, but you do in America.
“Section 37 of the Immigration Act, B.E. 2522 (1979) also stipulates that A FOREIGNER [emphasis added] residing in Thailand should notify the police station if he/she visits another province for more than 24 hours from the time of arrival. This would mean that a short weekend trip from Bangkok to Phuket would cause more red tape, even when you have already done all the basic TM30 reporting.”
Not only is Thai law clear that the foreigner is (also) responsible for reporting (and doing so within 24 hours of moving), but the foreigner also pays fines for failure to report.