Proxy piercing refers to a technology that enables hosts to determine whether a person is making a proxy purchase or not. A proxy purchase describes a transaction made where the original IP of a customer is disguised via the use of a proxy server. Proxy piercing allows one to see if there is a proxy being used by a customer attempting a transaction, and then depending on the level of the piercing program, will “pierce” the proxy server and determine the original IP of the transaction. At an even higher level, proxy piercing can also determine the physical location of that user.