Detect the open claim, dun, post the dunning fee, hand over if needed.

1. 1
   Open items appear in reporting as receivables or in the dunning scan.
2. 2
   In Dunning, choose the stage (1–3); deadline & dunning fee are configurable.
3. 3
   Generate the reminder as PDF – the dunning fee is posted automatically (debit 1100 / credit 3090).
4. 4
   After stage 3, optionally hand over to collection/debt enforcement.