AlphaBear

This is from personal experience getting a STV from thaievisa. After submitting my application they send me an email requesting an invitation letter and a copy of their ID. The evisa are processed by the embassy so it could be different depending on the location.

Try with Firefox

So on arrival at CM airport you had to produce evidence of full vaccination. Does that mean 'evidence' from produced by a Thai source or an international vaccine certificate issued abroad e.g. Australia? If you can't do that have to take a test..... a fast response test? Same as OP here. I got my luggage and left, no question asked.

It worked fine for me just 3 weeks ago, I guess every embassy is different.

If you use an invitation letter you also have to give a copy of your friend id.

I personally had to get a background check which was done online and quickly (1 day), I didn't have to provide any medical information. It could be different somewhere else, this was in Canada.

Remarks: From 1 October 2021, travelers is no longer required to download ThailandPlus App before travel to Thailand.