I always left it blank, never had a problem. Bought many guns new from FFL's. They still stole my id. These crooks steal databases, they may be a dept. store, or a bank, and it has all your stuff there.Your drivers license social, etc, I recentlly was asked if I was in Germany buying musical instruments for $6000.00, I said I didn't remember, unless I was sleep flying. I signed a piece of paper and that was it. They don't care, it's a write off. When I asked why would a 63 yr old man who never used the card end up in europe buying a tuba, no interest, on her part, suggested I call the music store if I wanted more info, to which I said if you don't care why should I. Just keep getting robbed.I cancelled the card immediatlly even though they still sent out new ones after I cancelled. No one knows what the heck they are doing anymore.