My sister is trying to get a 10 year green card.?

Question

and the green card she has now is 2 year one.

my stepmom petitioned us.

but since she had some probs w/ her. shes not in the u.s right now. she went back to country where we came from.

is it possible to apply for the 10year one when she not in the u.s ?

does she need a signature of my stepmom?

my sister is 15

and the green card(2year) expires on sept, 7th.

Answer 1

I think no, she can't apply for the 10 year card outside the US (but you should contact the lawyer about this).

I hope she won't stay abroad for too long because if she stays outside of the US for more than one year without obtaining a reentry permit or returning resident visa she will lose her 2 years green card.