This maybe a stupid question but I live in Chiang Mai and I am currently in Hua hin on vacation. On my return to Chiang Mai do I have to update my TM 30 to show I am back in Chiang Mai? Or is it only necessary to do this when I leave the country? TIA
TLDR : Answer Summary
When returning to Chiang Mai from a vacation in Hua Hin, you do not need to update your TM 30 unless you have arrived back from an international trip. The TM 30 update is required only when your international arrival card (TM 6) changes, which occurs when you enter Thailand from abroad.