Message Determination (Process Flow) 
Purpose
In the Subsequent Settlement component, you use this process to create messages for rebate arrangements and settlement runs, which supports communication with your business partners.
Prerequisites
The necessary settings for message determination must be maintained in Customizing for Subsequent Settlement. To create message control records (see below), you must have created condition records for the message types.
For further information see:
Functional Prerequisites for Message Determination Creating Condition RecordsYou must have selected Print output as the transmission medium for issuing the message.
Process Flow
For further information, see

You can also create messages for settlement runs. The NAST records are created automatically when you perform settlement accounting for a rebate arrangement.
Results
You can send the printout to your business partner.