Which document informs an officer they have received a documented counseling session?

The supervisor's report is the correct choice as it serves as an official record of the counseling session between a supervisor and an officer. This document typically outlines the main points discussed during the session, the issues raised, and any actionable steps or follow-up required. It is a formal way to document that counseling took place, ensuring that there is a clear trail of communication regarding the officer's performance and areas for improvement.

In contrast, the other options do not fulfill this purpose. A letter of reprimand is typically issued for more serious infractions and usually indicates a formal disciplinary action rather than an informal counseling session. An official notice could refer to various types of notifications and does not specifically imply a documented counseling session. An internal recommendation generally suggests a suggestion for future actions or improvements but does not serve as documentation of a counseling session.