Notification configuration

I have created the roll called CDH in that roll there are mutliple users are there, also i have created customized procurment app in that whenever any one cdh raised the request notification going to all the CDH, i want who is raising need to go notification that person alone how to do this

@Michael, please set up the system so that notifications are sent only to the user who created or raised a particular document. This should ensure that only the specific person who initiated the request receives the notification.