Leaving After Notice Period: What Should the Final Letter Include?

If an employee leaves the organization after serving the notice period and is in agreement with the company policy, what should the letter be named, and what clause should be mentioned in it? Please guide me.

Notice Period and Company Policy

Notice Period will be as per the Terms of Appointment.

In this specific case, I understand that the employee is leaving the service without serving the notice period as per your Appointment Letter, which is OK/Fine with your company policy. By virtue of this, henceforth, if all employees decide to leave the service without serving notice, taking this case as a precedent, is it OK? As a special case, you can waive the serving of the Notice Period without it being regarded as a precedent.

Relieving Letter Details

In the Relieving Letter, you can mention being relieved with immediate effect, and the notice period as required under Clause # of the Appointment Order is waived as a special case, as requested by you.