The present invention describes a method and system for ensuring data consistency amongst a plurality of disparate computing systems that communicate in order to provide an electronic transactional service. Information or data that is common between various databases associated with each of the disparate systems can be identified and monitored during communication. Once the common data gets modified, the modified data can be converted to a format compatible with all the other databases. All the other databases can then be updated to ensure that the modified data is consistent amongst the databases of the various disparate systems. In one aspect of the invention, adapters interfacing with each disparate computing system can identifications to common data. The adapter can communicate the modification to a central data control point (DCP), which can then update all other databases with the modification. During the update, the DCP can propagate the modification to adapters communicating with the databases of other application vendor product systems.