Do I need to transfer my entry stamp to my new passport for a 90-day report in Chiang Mai?

Go get your stamps transferred and do your 90 days after that it’s not a really big deal

Let me see, guide for D......

New passport, old passport got invalid and can NOT be used.

Transfer your entry stamp into new passport to show you are legal in Thailand.

Visit your local bank and change your passport number for your account

Visit Ministry of Transport to change your driving license, to new passport number.

Conflicting comments are always made by flowers/fruits/animals or anonymous.

First of all. Change all thing from old passport to new passport. Then you can do next step each place they have limit person in 1 day. Check at information first

My entry stamp was transferred to the new passport when I did my 90 day. He took longer than ideal with it. No idea if you could just show both passports. To get the stamps transferred across did not take long. Probably the shortest queue inside the building. Its the document check outside that took longer. Airport branch.