
Material Listing and Exclusion
Purpose
Material listing and exclusion lets you control which materials specific customers may or may not buy. For example, if you create a material listing for a specific customer, the customer can only order products from that list. You can also create a master record for material exclusion for a particular customer. Then the customer can not order excluded materials from you.
The following figure shows the functionality of material determination.

Partner Functions in Material Listing
Material listing applies to two partner functions in Sales & Distribution: the sold-to party and the payer.
In the standard version of the SAP R/3 system, when the sold-to party and payer are different, the material listing check is as follows:

The material listing for a sold-to party can include materials that do not appear in the material listing for the payer (for example, in the case of materials that are rarely ordered or only in exceptional cases)
Customizing
You make the settings for this in Customizing for SD Basic Functions.