SimpleJustice Portal: Sharing Documents
Once a site is added to a SimpleJustice community, you will have the opportunity to share documents with the Client/Helpseeker or User/Attorney portal. This option will appear by default in the static "Add New Document" form, and admins can enable in the dynamic blocks.

When an Client or User shares a document it is stored on the case in LegalServer, and is availble in the documents block.
Each time the record is updated, the receiving party is sent a notification.