Supplier Registration 
This function is described in the process description of the business process Registering Suppliers.
For more information about defining questionnaires, see Customizing for SAP Supplier Relationship Management (SAP SRM) under .
You can use supplier registration with SAP SRM and SAP ERP as a back-end system, or only using SAP ERP.
Upon registration of potential suppliers, a duplicate check based on the company e-mail address is performed to check whether they already exist in SAP SRM or SAP ERP. Existing suppliers are prevented from registration.
For you as a purchaser, the suppliers that come through supplier registration are all potential new business partners. However, the data pertaining to these suppliers is not immediately available to you in SAP SRM or SAP ERP.
Note
A supplier from supplier registration does not become a business partner in SAP SRM until the following steps have been carried out:
You have accepted the supplier in Supplier Preselection.
You have called up the Supplier Directory using OPI and transferred the supplier into the SRM Server System.