a9c4d876_Customer_Dunning_Letter__DUN___Description
[Field Name] 11 Starting Customer Code 12 Stopping Customer Code [Data Entry] Enter starting and stopping customer codes in the range of customers you would like to include. Press enter if you would like to begin with the first customer in the file and/or end with the last customer in the file. [Description] 
The starting and stopping fields allow you to print dunning letters for a single customer, a range of customers, or all customers.
Customer Dunning Letter (DUN)