My son and I are leaving Thailand and not coming back.
My son only has his Danish passport. His Thai one is expired.
Does he need to renew the Thai one to leave Thailand or is hos Thai id sufficient so he won't be stopped when flying out?
TLDR : Answer Summary
When leaving Thailand, a Thai citizen must typically depart using the same passport under which they entered the country. Since the user's son only has a Danish passport and his Thai passport is expired, he is advised to renew the Thai passport before departure. Various comments emphasize that renewing a Thai passport is relatively easy and can often be done swiftly in Thailand, sometimes even on the same day. It is also highlighted that parental consent may be required for travel.