Patent ID: 8793188

Claim:
A system for preventing electronic transaction fraud, comprising: a plurality of network-connected data processing terminals, including at least one server; means for receiving an electronic authorisation request at the server from a first data processing terminal, wherein the request is for authorising the processing of an electronic transaction associated with a cardholder's card data or account data; means for filtering the received request according to predetermined filtering criteria; means for identifying at least a second data processing terminal as a cardholder device; means for sending the request to the cardholder device, to notify the cardholder that processing of an electronic transaction is proposed, a parameter of which is said cardholder's card data or account data; and means for receiving interrupt data from the second terminal and for interrupting processing of the, or any further, electronic transaction with that card data or account data; wherein the first data processing terminal is selected from the group comprising an electronic point of sale terminal, an electronic card processing terminal, an automatic teller machine, a telephone, a cellular telephone, a radiotelephone, a portable computing device, a desktop computing device.