Error/Validation handling for "Save Form" action

Is there a way to handle errors/validation for the "Save Form" action?
It sometimes happens that our users click on the Save Button but have mandatory fields not filled out in one or more tabs. But they don't notice the hint on the field and think the form was saved.

I'd like to show a Status or Notification "Form not saved. Make sure all mandatory fields in all tabs are filled out." when any mandatory field is not filled out.

I know I could do this by checking if the fields are filled out one by one but I'd like to know if there is a more streamlined way that doesn't need to be updated every time the mandatory fields change. 

I tried with the scope control, but obviously a not filled out mandatory field does not throw an error that the scope control catches.