Did CVS go cash only for OV prepaids? I was trying to buy 4 $500 cards and selected credit, then swiped, handed card to cashier, he entered the last 4 digits and then the transaction was denied saying "other form of payment required". Was this a decline by AMEX? I saw no pending activity/fraud alerts when I logged into AMEX and I had sufficient available credit. I tried twice with the same result.