I have to ask...
Why did the process change from taking the information off the actual registration slips and why does the MOA request a copy of the club's membership roster?
I'm pretty sure that if we returned to counting the information provided by the individual on their rally registration the results would be quite different.
I noted there were volunteers processing *each* registration slip for other information so it would be pretty simple to go back to time honored method of checking actual registrations vs a system that is so easily rigged.
If you wanted to take the load off the volunteers you could require that the club rep provides copies of each member's registration showing their club number.