While this kind of workflow control is not available within pipedrive yet (basically users can do what they want), we are enforcing them with our clients using zapier, to achieve the desired results.

It's not the same as having these available inside pipedrive, but it gets the job done :-)

I've prepared a short video on the subject, if this is something you need in your (or your clients') workflows - just copy paste! :-)

 

https://vimeo.com/282917077