All of which brings us to the case of Mikael Patrick Sallnert, 37, a citizen of Sweden, who established and operated credit card payment processing services for the scareware ring cited above.
Prosecutors allege that each store allowed fraudulent transactions through extra credit card processing machines and would split the proceeds with other members of the ring.
Buying a diamond ring soon after buying petrol results in an even higher risk score: thieves often test a card's validity with a small purchase before buying something much bigger.