I have a Swiss passport which I renewed in Switzerland. The visa pages in the old passport were not "holed". I entered TH with both passports. Back in TH I went to immigration to transfer the visa. Easy.
correct. I have this problem too. My due date is mid March, a month I do not want to be in TH every year. But I have to restart the process to change the date. I hope for new visa procedures beginning 2025 if the EU/EFTA gets FTA agreements with TH. If.
could be now, but my 1st one laster December, after I returned, was approved. Try it. I know that the absolutely first has to be done in person. In Hua Hin, maybe different.