In SAP Business One the Dunning Wizard allows you to create and auto-send letters to customers who have overdue payments. You can determine which letter you’d like to send at which point past due. The Dunning Wizards also keeps track of interest accrued, and the customers payment behavior which is helpful in collections.
To access the Dunning Wizard from the Modules tab inside SAP Business One navigate to:
Sales A/R > Dunning Wizard