Before a list is loaded
- Every number is scrubbed against the do-not-call list you hold before it reaches a dialer or a sender.
- Records are matched by phone number so the same owner never appears twice under two names.
- Every record carries where it came from and when. If a source can't be named, the record doesn't load.
- Invalid, disconnected and carrier-blocked numbers are removed before the first attempt, not after the complaints.