An electronic ticket is presented for services utilising a customer trusted agent. A cryptographically secure session is established between the customer trusted agent and a merchant trusted agent. A first host processor informs the customer trusted agent of the electronic ticket selected for presentation and the customer trusted agent sends a copy of the electronic ticket to the merchant trusted agent via the cryptographically secure session. The merchant trusted agent checks the validity of the electronic ticket and notifies a second host processor to deliver services identified by the electronic ticket. The merchant trusted agent notifies the customer trusted agent via the cryptographically secure session that the electronic ticket is in use. The second host processor then informs the merchant trusted agent that the services have been rendered and the merchant trusted agent sends a new ticket value to the customer trusted agent.