How do you deal or convey message to a fired employee within organization if you are HR?

The nature of how to convey message to a  fired employee depends on the reasons behind it.  However, first of all the manager should satisfy himself that the employee is being fired for the right reason.  If he feels that the employee should be fired in the interest of the organisation/administration, then he should find the most appropriate time to convey the message confidentially in a short and gentle manner.

Be Clear and Direct

Take Ownership of the Problem

Let Timing, and Medium, be Part of the Message

Convey the message with smooth and soft

Talking about his/her mistakes, if he/she admits : tell that it's not good for the company or organisation

Say an apology for his/her dismissal