No chance for fraudsters
This is a bit late from when the experience occurred in 2017 but still worthy of a compliment. 
Someone was purchasing I-tunes products through my Discovery Card (I don't have anything apple or an I-tunes account). I called in and told them what was happening and even though it was a reasonably small amount, they immediately referred me to the fraud dept, cancelled my card and sent me a form for me to explain exactly what happened as a formality. 
Within 2-3 w/days the fraudulent claims were reversed and I was contacted regarding delivery of my new card at no extra expense to me which was delivered to my work 2 days later. 
Well done Discovery Card, this was a true example of great customer service.