Abstract: A method of facilitating a transaction during a voice call between a caller or callee and an agent, for example for a merchant or organisation, the method comprising: activating a secure mode of a call processor adapted to prevent sensitive information relating to the transaction provided by the caller from reaching or being accessible by the agent; transmitting a notification that the secure mode has been activated to an electronic wallet accessible by the caller in which the sensitive information is stored; and processing the transaction in dependence on or using the sensitive information received from the electronic wallet; wherein the notification is transmitted to the electronic wallet via the voice call.