Reference alignment
Where each record came from, and when.
Nothing is sourced until the shape of the audience is settled. Suppression is applied at the start, so the approved figure is the delivered figure. Rather than a percentage, you get the numbers the percentage was made from.
Overlap reporting
Where segments share records, stated rather than double-counted into a bigger total.
Re-supply terms
Agreeing in advance what happens if the file turns out to be wrong.
Contact precedence
Choosing which person represents an organisation when several qualify, by a stated rule.