Originally Posted by
billatq
JCB only works as a Discover for in-person transactions only. If you manage to get it to work online, it's generally an accident.
As someone who has an online side business, I didn't realize this until now. I had actually turned on JCB over at authorize.net since I take Discover, but have never been able to test. I wonder how difficult (and how expensive per transaction) it would be to legitimately accept JCB.