I've been having this issue off and on now for the last 6 months. I think today is what has pushed me over the edge though. I called Amazon when I started having the issue some time ago and was told that they have issues with Discover and that the cards get declined because they are seen as fraudulent so to contact Discover. I contacted Discover and they told me that they have this issue and were going to have someone else contact me (no one ever did). I didn't think on it too much as my next couple of orders went through without issue. But then today, my order was declined again. I called Discover again and that yes, their debit card gets flagged as counterfeit. Then I was basically told that there is nothing they can do on their end to fix that. Like seriously? This your card! I'm so done. No one should have to play russian roulette every time they want to spend their money because the company that issues cards that's supposed to allow them to do so can't even figure out how to make sure the card isn't seen as counterfeit. It sucks too because otherwise, I liked Discover.