When creating event communications would it be possible to generate a unique finder number to be used in both mail and email exports that identify the individual, the event, any sub-events, and the specific communication which they received? For example, for mail we could pre-print the number on the booking forms and for email it would be carrying that data through to the BBIS and automatically populating that information. Such a number would increase processing efficiency for event registrations. Such unique numbers are already used in the mark/comms area.