We're looking for a solution to send a reminder email to the user that sent a specific document (i.e. to follow up or complete the document manually if necessary). At this point there is only an option to send a notification to the "Assigned user". My client has contacts that are used by different users, i.e. one user might send a document this month and another user could send a document to the same contact next month, so the "Assigned user" is not that useful.