Section 64 of Evidence Act "Proof of documents by primary evidence"
Documents must be proved by primary evidence except in the cases hereinafter mentioned.
Section 65 of Evidence Act "Cases in which secondary evidence relating to documents may be given"
Secondary
evidence may be given of the existence, condition, or
contents of a documents in the following cases:-
(a) When the original is shown or appears to be in the
possession or power -
of the person against whom the document is sought to be
proved , or of any person out of reach of, or not subject
to, the process of the Court or of any person legally bound
to produce it, and when, after the notice mentioned in
section 66, such person does not produce it;
In cases (a), (c) and (d), any secondary
evidence of the contents of the document is admissible.
In case (b), the written admission is admissible.
In case (e) or (f), a certified copy of the document, but no other kind of secondary evidence, admissible.
In case (g), evidence may be given as to the general result of the documents by any person who has examined them, and who is skilled in the examination of such documents.