The standard format of official correspondence in the federal government begins with ______?

The standard format of official correspondence in the federal government begins with ______?

وفاقی حکومت میں سرکاری خط و کتابت کا معیاری فارمیٹ ______ کے ساتھ شروع ہوتا ہے؟
Explanation

Federal government correspondence starts with a subject line to state the purpose and a reference number for tracking.

This ensures clarity, quick reference, and proper filing of the document.