Originally Posted by
deaconx31
Every time this happens to me its because the cashier mistyped my last 4 digits. That's when I explain the issue, swipe again, and then verbally give them my last 4. 100% of the time it goes through on this second attempt
This is very likely if you use an AMEX card. I loaded REDbird a few days ago and the cashier entered the 4 digit CVV instead of the last 4 digits of the card.
I think the way AMEX groups the last 5 digits of the card number throws them off if they are not used to loading prepaid cards.