Originally Posted by pitflyer

It seems like its an offline PIN that gets updated only after you do a non PIN transaction; my first attempts at using the card at Costco were rejected twice (it did prompt for PIN) so rather than lock it out I went to a different credit card.

I did set my PIN 'again' (so it is possible I set it incorrectly the first time) and then I went to Sams Club which also prompted for PIN. It said 'third and final attempt' and I could have sworn it said 'Not valid' but the transaction went through anyway. My next transaction was at Target where I was expecting another PIN prompt but it went through without any PIN or signature prompt. Next I went to a restaurant where I am guessing their terminal didn't accept PIN so I had to sign. Finally, went back to Costco and Walmart and both places now my PIN was officially accepted, no signature required, receipts say 'PIN Verified'.