Abstract: A system for use in processing cash transactions comprising an electronic processor and a database, the processor comprising an interface for receiving requests for generating coded numbers representing cash and receiving requests that numbers previously allocated may be redeemed, the interface including a message format storage area storing a plurality of prescribed message formats and determining by reference to the stored message formats the format of a received message, a holding memory for holding requests of specified message formats so that single requests for generating a plurality of numbers in a batch can be processed.