Made my trip to Bangkok Immigration last week to apply to convert my tourist visa to a non-immigrant O. Hope I got the terminology correct as, yes, it does matter. I had executed my income affidavit the day before at the US Embassy.
The first step is getting to the correct office. My first try to figure out where to go on Google Maps gave some place SE of Lumpini Park. That would not have been good. I needed to go to Division 1, which is out in the direction of Don Muang airport. http://bangkok.immigration.go.th/en/location1.html I copied the address from the website and showed i