Deleting SAP Systems on the SAP Service Marketplace 
For licensing reasons, SAP requires complete details on systems that have been shut down.
Request your SAP system to be shut down on the SAP Service Marketplace at http://service.sap.com/system-data. For more information about the deletion procedure, see SAP Note 94998.
Note
If you have questions about this, create a message in the SAP Support Portal (component XX-SER-LIKEY).