Lawful basis first
A CSV cannot be imported until the importer confirms the lawful basis. The basis and source are stored with every lead, so the reason a person is in your workspace is never lost.
One record per person
Leads are deduplicated across the workspace, so two campaigns cannot quietly contact the same person twice.
Suppression that sticks
Unsubscribes and do-not-contact entries apply to the whole workspace and are rechecked immediately before every send.

