When charged with mail fraud, government prosecutors will attempt to prove that you intentionally created a scheme to defraud someone and used the U.S Postal Service or interstate carriers (FedEx, UPS, DHL) in execution of the alleged crime. Much the same, wire fraud convictions rely also on the ability to prove there was intent to knowingly defraud someone, and a form of electronic communications (radio, internet, television) was used in the commission of the alleged criminal act.