Why does an anonymous proxy affect the fraud score so heavily?
One of the ways a credit card fraudster can evade attempts to track them down is to use an Anonymous or Open Proxy. These proxies hide the true location of the client. The analogy in the real world would be if somebody walked into a bank wearing a mask. We recommend treating Anonymous and Open Proxies as red flags. We have noticed a high number (perhaps 40%) of our fraudulent purchases come from Open Proxies, and it is known that organized credit card fraud rings use Open Proxies.
