I was born in Thailand but left as a baby. When I left Thailand as a baby and it was noted in my British passport born in Thailand, 

I then returned to Thailand as a 4.5 year old on the same British passport and was stamped into Thailand 2004. I have dual nationality

but have not left Thailand since as I entered on that British passport. Therefore I was never stamped out, will I have any trouble when

travel overseas. I hold both Thai and British passports now I am 18 years old and I would leave and return using the Thai one.

Do I need to inform Immigration as I guess I am still on the system as entering on the British passport.

With that old of an entry I think you can leave using your Thai passport without a problem. Not sure how long they keep entries active in their database.

 

 

2 hours ago, ubonjoe said:

With that old of an entry I think you can leave using your Thai passport without a problem. Not sure how long they keep entries active in their database.

 

 

I guess I will try and if pulled up on it plead ignorant to the fact as I was only a 4 year old. I only know because I just found my old original passport.