Buyer placed the order for Diablo 3 and Reaper Of Souls games in Oct 2015, then sent a request to have the CD keys emailed to him prior sending the physical games. I emailed the CD key to his Paypal email address as requested. However, he refused the package, and almost 3 months later filed a charge back in Jan 2016.
I checked the CD keys right after getting the charge back notice from Paypal, both CD keys have been claimed.
It was clear that the buyer used the CD keys then still filed the charge back. I was hit with the refund plus $20 fee by Paypal.