Aging
Open balances move through Current, 1-30, 31-60, 61-90, and 90+ buckets. The 90+ bucket begins after day 90. Manual and automated delivery share one ledger, so Underflow knows what the payer has already received.Dunning
The hourly scheduler runs one dunning pass during the workspace’s local eight o’clock hour. In a fractional-offset time zone, that can be 8:15, 8:30, or 8:45. It sends or proposes at most one notice per invoice per pass:- The initial invoice, if no non-failed attempt is on file.
- One reminder when the balance crosses each aging bucket.
- A final notice when the balance is more than 90 days past due.