I'm reviving this because I got declined today for the first time. This was my 4th order in a month. All of them were on different AMEX Giftcards. Same denial regarding information matching.
1) I've never called in the past to register the AGC. It just "worked". Do I need to do that?
2) Any particular reason why I was denied this time and not others? Or is it just random with GCM?