informa l’ambasciata Thai che stai richiedendo un nuovo passaporto e se puoi usare il visto con il numero del vecchio passaporto, quantomeno avrai una risposta per iscritto quando arrivi qui, altrimenti rischi che non ti riconoscano il visto e ti facciano entrare con visa exempt. Comunque anche in quel caso poi andare all’immigrazione e richiedere la conversione del visa exempt di 30 giorni in non O. C’è una procedura da fare ma è fattibile.
If you are moving to Thailand you still have one year on your passport I suggest you use the existing passport to enter Thailand then you register with the Italian embassy as AIRE (it’s compulsory in any case) once you are registered you can renew the passport in the embassy, takes half an hour once you have the appointment, the embassy will issue a letter about the new passport for the immigration and you will get your extension of stay in the new passport. You can also get your extension of stay in the existing passport and once you have the new one immigration will transfer the stamp from one to the other as a free service, only downside of this is that they will not give you one year but only until validity of the passport.
The visa you will get will be electronic, not a stamp in the passport, so I honestly don’t know if it will be valid if the passport is then cancelled. There isn’t a clear answer on this anywhere.
I don’t see why you should run into problems if you had a regular ED visa/extension you canceled it and you will now get a multiple TR visa. As long as you satisfy the conditions to have it you’ll be absolutely fine. They will be more than happy to see you come and go as a tourist. What they don’t like is finding people staying with a different purpose than the permission they have to enter the country. If you use the visa exempt to live here you will get caught as you are using the visa exempt that is a short term permission to stay long term. If you use the TR multientry to come and go it’s exactly the purpose so you’ll be fine.
If you are legally married you don’t need to have two retirement extensions of stay, but one and the wife will be dependent on the husbands. Otherwise yes you need to individual accounts.
depending on what visa he will be arriving he will need a return ticket within the maximum stay he is allowed on first entry, if he comes on no visa required he will get a 30 days he will need a exit ticket from Thailand to ANYWHERE (also neighboring countries) within the 30 days, even if he can renew that. He will also need a hotel booking or something stating where he is staying and the equivalent of 20,000 baht cash in any currency. All this information will be on the website of the Thai embassy. But bear in mind that the airline will check then onward ticket, while the possibilities of him getting stopped at immigration are very very scarce. Maybe for extra security just have him a carry a letter where he is going and where he is staying that is with you and his step dad, just for extra care, but nothing to worry. I do understand your worry!
you got your reply reply he cannot get a dependent visa unless legally adopted. For unaccompanied children you need to get the regulation from your country of origin, it’s not a Thailand related question.