CoViD-19 Unable to Travel Extension Experience (Bangkok, Chaengwatthana Immigration):
* Came at around 13:40 pm.
* Had to fill the form before entering the building, the answers were "no" for each question.
* After checking my form, I was asked regarding when I had my last ATK test, which I answered as never having it at all, then was asked if I agreed to get tested in the ATK testing place adjacent to the building, I agreed. Perhaps the unvaccinated part made them panic.
* Got a negative test result and was asked to take a picture and show it to the person working at the entrance.
* Waited for about 3 hours to get my visa extended (70 people queue). No questions asked. Had an embassy letter, so it was a smooth process. I didn't have a TM30 form, as I was never asked to provide it, I told that my address didn't change since my previous extensions, so the immigration worker checked it online, and didn't make it mandatory among my documents.