Will this cause a problem when filing K1 petition?

[♥Yllen 3]

My fiance traveled to see me using his native country passport and left (entered the US back) with the US passport.

When he files the K1 petition, he´ll have to send copies of both passports for evidence of his visit.

We wanted to know if this would not cause any issues (the non us passport).

[Kathryn41 3,205]

If you fiance legitimately has dual citizenship in both countries and used his native passport to enter, then his US passport to return home, then yes, he would include copies of both passports as evidence. While the US does not officially recognize dual citizenship it is aware that some of its citizens do still retain citizenship in their countries of origin. As long as he is able to prove he is a US citizen at the time of filing the application it shouldn't cause a problem that the evidence of meeting in person within the last 2 years requires 2 different passports. Be sure to have him write an explanation of the situation just so it is clear. Good luck.

[♥Yllen 3]

If you fiance legitimately has dual citizenship in both countries and used his native passport to enter, then his US passport to return home, then yes, he would include copies of both passports as evidence. While the US does not officially recognize dual citizenship it is aware that some of its citizens do still retain citizenship in their countries of origin. As long as he is able to prove he is a US citizen at the time of filing the application it shouldn't cause a problem that the evidence of meeting in person within the last 2 years requires 2 different passports. Be sure to have him write an explanation of the situation just so it is clear. Good luck.

Thanks for your response. That´s what I told him to do, write something explaining he has dual citizenship (I read its not a problem: http://www.newcitizen.us/dual.html) and it was more convient for him to use his native country passport.

He really used it to avoid the reciprocity tax fee Argentina charges at US Citizens upon arrival.