Transaction Verification System

A transaction verification system comprising a central data processing system, a plurality of satellite data processing systems discreet from the central data processing system, a plurality of audio and/or visual recorders that are discreet from the central data processing system and adapted to record sounds and/or images and to convert recorded sounds and/or images into digital data and communication means by means of which recorded digital data is transferred from the audio and/or visual records to the central data processing system and by means of which the satellite data processing systems communicate with the central data processing system, each audio and/or visual recorder being associated with one or more satellite data processing system, and the central data processing system including a data store within which digital data received from the audio and/or visual recorders is stored, the data store being divided into subsidiary data stores, each associated with one or more satellite data processing system, and the central data processing being programmed to store digital data from audio and/or visual recorders associated with a particular satellite data processing system in a subsidiary data store associated with that satellite data processing system and to communicate data stored in a subsidiary data store only to a satellite data processing system associated with that subsidiary data store.