Originally Posted by
bneoma
Just curious - do you mean that the immigrant visa is stamped in your passport? Or do you have an I-551 stamp (temporary evidence of greencard), from previously entering the US using the immigrant visa? I thought that immigrant visas were in the form a large envelope containing your file, with a one page visa attached to it (that may not be the case, I'm just going on what I recall from several years back. In my understanding they're one-time use, effectively converting to a greencard on entry to the US).
In any case, even if you already have the I-551, I'm don't know how that would be handled by the US if your country of citizenship subsequently changed.
I agree with the advice to talk to an immigration attorney. Good luck.
do you mean that the immigrant visa is stamped in your passport?
Yes, it is stamped in my passport

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do you have an I-551 stamp (temporary evidence of greencard), from previously entering the US using the immigrant visa?
I haven't been to USA yet but planning on going soon.
I thought that immigrant visas were in the form a large envelope containing your file, with a one page visa attached to it (that may not be the case, I'm just going on what I recall from several years back. In my understanding they're one-time use, effectively converting to a greencard on entry to the US).
I have got everything with me.