Confluence and external document sign off

[Deleted user]

We are looking to move a range of documents on to Confluence however a number of these documents go through a customer sign off cycle.

We need a way to both publish the document to a specific client; for them to be notified the document is ready and a way for them to sign off the document for it to then be returned for action.

Research so far has found plugins by Comala which look great but they do not appear to support external interactions and providing licensing for customers would not be commercially viable.

There must be other companies or organisations that have overcome the same problem so hoping there maybe some good ideas or pointers out there?