My wife (Thai) has both her Thai passport and UK passport.
We leave UK 7th December and we both have used UK passports for leaving UK and for flight booking.
Two questions:
1. My wife can enter Thailand with her thai passport and does not need to fill in a DTAC form?
2. When returning bavk to UK, we have a plane ticket using our UK passports. Does my wife leave thailand using her thai passport, but at the check in desk use her UK passport?