Once the task associated with an event is completed, you must mark the event as complete to ensure Conga Contracts does not continue sending email notifications for the event. However, marking an event as complete will only stop notifications if the frequency of the event is Single, indicating the event occurred only once. For events with a frequency of Monthly or Yearly, marking the event as complete will complete the most recent occurrence of the event, but Contracts will continue to send email notifications for future occurrences of the event. To stop all email notifications for monthly and yearly events, you must close the entire series.