Automatically Write Note onto "Notes" tab on request details

We would like to add a permanent note to the notes sections once a request has been submitted. We want the system to automatically add a "Note" to the request details anytime a request is submitted, describing some of the rules/process of our district

Basically, we are looking to automatically add a note saying something very specific within the "Notes" tab of a request, regardless of the group submitting it, or possibly specified per classification.