This document provides instructions for setting up an automated dunning process in SAP Business One to send late payment notices to customers. It describes defining dunning terms, which include fees and interest rates applied at different dunning levels (e.g. 30, 60, 90 days past due). The dunning wizard tool compares invoice due dates to dunning levels and generates letters. The document outlines customizing letter layouts, specifying default dunning terms, creating and running wizards, and viewing results to refine the dunning process.