If you are a follower on tasks, you will not receive in-app and email notifications about their completion.
In order to track the completed tasks you follow, use the task management dashboard, more precisely - the Following tab in the main view. Here you can select to view only completed tasks by checking off the box on the upper right-hand side.
For a more specific view, combine those criteria with any filters and sorting options:
Managing tasks is not only possible in the dashboard. With our Task sidebar view you can always stay on top of your obligations during legal documents creation and collaboration.