Device for selectively blocking remote purchase requests

A method for selectively blocking a remote purchase request based on information gained from previous remote purchase requests, comprising:

• (a) providing a memory subsystem;
• (b) receiving and storing, in said memory subsystem, information from purchase request information sets including, for each purchase request information set, an origin, a card number and an item;
• (c) receiving and storing a current remote purchase request information set including an origin, a credit card number and an item;
• (d) comparing said current remote purchase request information set with said purchase request information sets stored in said memory subsystem and blocking said current remote purchase request if said comparison meets any one of a predetermined set of criteria wherein at least one criterion includes a condition that said purchase request origin of said current purchase request match a purchase request origin of a purchase request information set stored in said memory subsystem, for which said card number is different.