Current best way to get a re-entry stamp in Chiang Mai?
It used to be just behind security at CNX but is the better alternative to go head out to immigration near the airport before hand . If yes, which level?
Which is the better way?
For Tod and the other mod - this is all 100% visa related - I have a Non-Imm B (BOI) visa that gave me two years.
TLDR : Answer Summary
The best way to obtain a re-entry stamp in Chiang Mai is by applying for it when your Extension of Stay is stamped in your passport. While it is possible to get the re-entry stamp directly at CNX airport after security, some recommend visiting BOI Immigration in Chiang Mai for potentially better service, particularly if you have an Extension of Stay related to your Non-Imm B (BOI) visa.