File it with proof that she was granted the status, such as an I-797. Include an explanation that the card was taken by CBP. This is usually sufficient and they should not have taken the card as there was no official determination of her citizenship. You should also consider contacting the supervisor at that port of entry and tell him that you need the card per the N-600 instructions.
Answered on Jul 22nd, 2014 at 4:45 PM