Can supplier create external confirmation without using SUS?

Dear SAP gurus,

We plan to use SRM 7 with backend ECC 6 and we're evaluating whether we need to use SUS or not. We're interested to have suppliers to create confirmation by themselves and then it will need to be approved by our internal staff.

Seeing from library in http://help.sap.com/saphelp_srm702/helpdata/EN/1a/ef10b6ae844862af619e051a0749bc/frameset.htm we think that it is possible to create confirmation without SUS (we only need to assign role /SAPSRM/SUPPLIER). However in the same page it mentions for more information see confirmation processing. Clicking the link bringing me to SUS screen (URL: http://help.sap.com/saphelp_srm702/helpdata/EN/46/533ae558de0db6e10000000a1553f6/frameset.htm).

This is a very classic SAP, not really clear on the statement 🤪 Can someone shed some lights on this? Do we need SUS, for supplier to create confirmation or invoice?

Best regards,

John