- Writing proof of — Writing include the signatures which under law can be proved either by calling the writer himself or by recording evidence of such a person in whose presence the document was written or by producing such a person before the Court who was and could be acquainted with writing of the writer or by comparison of the writing & signatures by the Court itself. Abdul Waheed Butt v. Excise & Taxation Officer and 3 others 2003 SCR 298 (B)