Quote:
Originally Posted by David
Entering the US is a nobrainer since she has to use the US passport. Entering Thailand with a US passport limits the time she can stay without a visa so she’d rather enter with the Thai passport.
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I would think it does not matter because having dual passports she doesn't even need a visum.. at all.
So presenting ones self to the Thai customs.. even if by chance she did it on a US passport.. 30 day visum free
enter all you want
Who cares if you stay 40 days if the person is a THAI citizen the 30 days simply do not apply
But as others have said.. just use the one for the country you are entering and you'll benefit from all the easy access available to nationals of that country
nobrainer.