Indian Evidence Act, 1872
80. Presumption as to documents produced as record of evidence
Whenever any document i.e. produced before any Court, purporting to be a record or memorandum of the evidence, or of any part of the evidence, given by a witness in a judicial proceeding or before any officer authorized by law to take such evidence or to be a statement or confession by any prisoner or accused person, taken in accordance with law, and purporting to be signed by any Judge or Magistrate or by any such officer as aforesaid, the Court shall presume –
that the document is genuine; that any statement as to the circumstances under which it was taken, purporting to be made by the person signing it, and that such evidence, statement or confession was duly taken.