Request approval notification

This should be a simple option but I cannot find it.   We use Issue approval processes on requests.  When a requestor submits a request, the approval process starts automatically.  We would like for a notification to be sent back to the original requestor once the approval process has been completed.  The notice should say whether the request was approved or rejected.  This email notice seems to be missing from the list of notifications.  The only notice a requestor seems to get after submitting is once a request has been converted into a project, or once the coverted project is completed. However, not all of our requests that have approval processes get converted into projects. So we need a way to provide notice.  Has anyone found a solution perhaps using Fusion, or can anyone poiunt me in the direction within setup where we can turn on issue approval decision notifications?