Hi Tod, in a previous post you mentioned this :

When you stamp in to thailand that system matches by, country of origin, DOB, Sex, Age, Surname etc not just a passport number.

They can see your entire entry/exit history going back as far as they want.

How does it work when you have two different passport (bi-national I mean) ? Do they actually can trace all your entries for both passports ? Or the fact they match by country of origin first means they won’t be able to trace the other passport ? Thanks in advance for your insights 😉