My non B-Visa trip to Savannakhet was sabotaged when my school didn’t provide an approval letter from the MOE which is apparently a requirement. If I get a 60 day tourist visa from the Thai consulate can my school convert it to a Non-B at immigration in Bangkok? Or does it have to be a 30 day visa on arrival by flying in? My car is parked at the border in Mukdahan so flying isn’t really an option.
TLDR : Answer Summary
You can convert a 60-day tourist visa or a 30-day visa exempt entry to a Non-B visa at the immigration office in Bangkok, provided that your school can supply the necessary documentation. Ensure you have at least 15 days remaining on your current entry stamp, as the conversion process takes about 14 days for review.