Hi there, I just got a new passport and was told I need to go to Samui immigration (which is apparently closed friday and monday). Do i need to get a new TM30? is there anything else I might need to have prepared with a new passport? They're not answering their phones....thanks
TLDR : Answer Summary
When changing your passport in Thailand, you need to visit Samui Immigration to transfer your existing visa stamps from your old passport to the new one. If you have a visa (sticker or stamp), no action is needed. However, if you are on an extension of stay, you must get the stamps transferred. A new TM30 is not required, but you should prepare a form to request the transfer, although it is unclear if the same form used in Bangkok is accepted in Samui.