I have two passports: a US and Israeli passport.
If I fly back to Thailand and use my US passport, I definitely want to get a new one first because it’s full of visa extension stamps and entries/exits.
However, my Israeli passport is empty. Can I just use that one instead? Or should I always use the US passport flying into Thailand considering that’s what I used in the past and that’s what’s in their system for my name and finger prints?