Abstract: An acknowledgement delivery system is provided that is associated with at least one transaction between a transaction initiating party and a transaction fulfilling party. The transaction is given effect by the transaction fulfilling party. The transaction is initiated by a transaction instigation event and completed by a transaction fulfilment event. Each transaction is defined by a unique transaction identifier. The system transmits events associated with the transaction fulfilment event to the transaction initiating party by way of preset data sequences defined with reference to the unique transaction identifier. The preset data sequence is transmitted to a translate and relay mechanism when initiated. The preset data sequence is mapped to a corresponding first mapped data sequence by the translate and relay mechanism and then transmitted to said transaction initiating party.