adakgb19

8 hours ago, murikamba said:

I have two passports. Korea and US. I entered using Korea Passport that gave me 90-day stay. Flew to Seoul and entered using US passport that gave me another 30-day stay. Don't want to mess with immigration, their 90-day reporting, and TM30 nonsense. So I am flying to Singapore and would attempt another entry using my Korea passport. Will see what happens. Trying to avoid land border crossing. It is very tiring for me.

Hey this is very interesting! Please, let us know here what happens when you try it next time. By the way, did they scan your fingerprints? And is your name in both passports same?

I think it would be very advantageous to have 2 passports as 2 complete separate identities not linked together.

For the fingerprint scanners, has anyone tried obfuscating their fingerprints upon entering/leaving? Available methods may include very fine sandpaper and/or potentially a bit of fingernail polish. That would make fingerprints hard to read and recognize. One could claim no knowledge of any wrongdoing because many things could have caused this naturally. This is called plausible deniability.

It remains to be seen what their response would be and how many cases like this they are seeing each day. This may be a question for a separate thread though.

6 hours ago, ThaiBunny said:

But my passport certainly doesn't include fingerprints, so what biometric data could they be validating?

Are you US citizen? It is correct, albeit the passport being biometric it does not contain any fingerprints.

Many thanks to all who responded!

In all honesty, yes, I was hoping I would get the option of gaming the system by switching between the two passport. That way I would not have to apply for visa should I wanted to stay a bit longer. But since I will link the passports together that won't probably be an option.

My other EU passport is German. Another reason why I wanted to use my US passport this time is because I live in the US. If asked by Thai immigration about my personal business I guess it might come across weird stating my US residence while using German passport. Maybe am I overthinking it?

Hi, to anyone who is dual EU and US citizen, which passport is preffered to enter the Kingdom of Thailand? To my knowledge both passports offer the same 30 days visa exempt stay. Is the treatment of US and EU citizens the same? I wonder what your personal experience has been.

Additional questions:
1) In past, I used my EU passport once to enter the country and I wonder if there would be any problem if I now used my US passport to enter.
2) Allegedly, Thailand has begun collecting biometric information. This kind of goes back to the question 1) whether switching passports would be okay in future since now you could be uniquely identified just by your fingerprints ...
3) In past and possibly in future, could 2 different passports be used to circumvent the rule of max 180 day stay per year? 
4) Did you see any difference in how ordinary locals treated you presenting yourself as either citizen?

I know this is rather unusual question and that a very few people probably fall into this category of dual citizens so any answer any tip or suggestion will be greatly appreciated. Thanks & Happy New Year!