User Profile Notes
Add notes on your members’ profile pages on a separate tab that only users with the appropriate permissions set can see.

You can install this add-on by using [TH] Install and Upgrade, installing it manually, or ZIP Upload (XenForo 2.1. and higher).

Features
Add notes to user profiles
Edit your own notes or ones added by other moderators based on permissions
Delete your own notes or ones added by other moderators based on permissions