When I try to checkout (live mode) via Authorize.net using my Discover Credit Card it doesn't seem to work.
I would get the message: "We only accept Visa, Mastercard, Jcb, Diners Club"
On Authorize.net I have these enabled in the payment processor: "Diners Club, Discover, JCB, MasterCard, Visa". And I know that my payment processor is setup to accept Discover since I accept them in-store.
Since I do not accept Amex, I have removed it from the Accepted Cards option in Authorize.Net Extension.
And when looking at the Accepted Cards payment option I do not see a Discover option as well, so I am wondering if it's Tasty Igniter that might be blocking it which I highly doubt but I just wanted to confirm.