Non-member notes do not include special codes for topics or purposes – they are by design a free-form note-taking system. In order to use the system for connecting employee referrals to later actions by that person, you might procedurally require that staff always use the first 10 characters of the notes to write in the referral topic, then add in the rest of their comments afterward. If that is reliably done, then it could be possible to pull reports on that initial referral topic then connect that to other actions taken when the member becomes a member, books a loan, etc.