Evaluated Receipt Settlement Invoices Display 
You can use this function to display Evaluated Receipt Settlement (ERS) invoices in Supplier Self-Services (SUS) for the Service Procurement and Plan-Driven Procurement with Supplier Integration business scenarios.
The purchaser has made the necessary settings for automatic settlement:
In Supplier Relationship Management (SRM): under
In Materials Management (MM): in transaction MRIS
Credit memos from SRM arrive automatically with the status Accepted.
ERS invoices from MM arrive automatically with the status Invoiced.
You have a contract with a purchaser to perform a certain service at a fixed rate. The purchaser can specify that the system should automatically create an ERS invoice, and send it to you when you confirm a service. Instead of creating invoices yourself each time, you can simply display the ERS invoice in the SUS system.