A show cause notice (SCN) is a notice issued by management to the deliquent employee, to show cause as to why appropriate disciplinary action should not be taken against him, for the various charges levelled against him. But a Charge sheet is a document which gives a precise and clear narration of the charges that are levelled against him.
Both SCN and Charge sheet calls for written explanation from the deliquent employee, within the stipulated time and after receipt of explanation, further course of action shall be decided.