When on a tourist visa.. I have just got a new passport due to running out of pages, do I need to get this tourist visa transferred over from my old passport to my new one by immigration here in Bangkok before flying to Kuala Lumpur or can I just show them my old passport along with my new one at the airport? Thanks
TLDR : Answer Summary
When traveling on a tourist visa in Thailand, if you've obtained a new passport, you don't need to transfer your visa to the new document. Instead, you can simply present both your old passport, which contains the visa, and your new passport at the airport. Customs will stamp your departure in the new passport.