SAP Message USC620 - Contact person is unknown; the contact was not assigned

Diagnosis
Sender &2& (&1&) has no contact. For this reason, no processor can beautomatically assigned to this contact.

System Response
The contact is not assigned to any processor. For this reason, thecontact appear in the general inbox.

Procedure
Maintain a contact for stakeholder &2& to enable automatic assignmentin the future. Assign a processor to the contact manually in thepresent case.