If by this, you mean the couple's passport of their original homeland, the validity of their foreign passports, except as a means of identification should not have any bearing on their application for naturalization, if they are otherwise eligible to naturalize. But note until they become US citizens, and for other reasons not connected with their wish to naturalize, they should have a valid passport of their country
Answered on Jan 09th, 2014 at 4:48 PM