You can define which types of approval events can trigger notifications.
To define approval events that can trigger notifications
Open the AP:Administration form in a browser and click the Server Settings link in the navigation pane.
In the AP:Admin-ServerSettings form, click the Escalations tab.
Select the appropriate option button for each event.
Disabled—Select this setting if you never want the event type to send a notification
Enabled—Select this setting if you want to send a notification for each type of event
Enabled Including Alternate—Select this setting if you want the event to trigger a notification for both the intended approver and any designated alternates