This may be a silly question, but I'm just not sure. Can one apply for their 30 day extension (45+30) at an immigration office in a province that's not where they're 'registered' or whatever. So if I live in Chiang Mai long term and so have not needed to update that TM form for a long time, but I happen to be in BKK when the time comes to extend another 30 days, the people in BKK aren't gonna tell me I have to travel back to CM to get the extension are they? OK hopefully that's clear enough, thanks 😄
TLDR : Answer Summary
Yes, you can apply for a 30-day extension at an immigration office in any province in Thailand, including Bangkok, even if you're registered in Chiang Mai. However, it's generally required to provide an address in the province where you are applying. In Bangkok, a TM30 receipt might not be enforced for this type of extension, but confirming local requirements with the immigration office is advisable.