Under Section 63 of the Evidence Act, a photocopy of a document is secondary evidence.
As per Section 64, a document is required to be proved by its primary evidence, which means the original document itself being produced in court. However, in certain situations, as laid down in Section 65 of the said Act, secondary evidence can be given. For example, where the original document is shown to be in possession of the person against whom it is to be proved, or where the original document is shown to have been destroyed or lost, etc., secondary evidence in the form of a photocopy may be given, subject to certain conditions. So, it all depends on facts of the case.
In your case, if the photocopy is to be given for the document which itself is alleged to have been forged, then the question would arise whether forgery can be proved by way of the photocopy of the original document. It is generally very difficult to prove forgery from a photocopy of the document which is alleged to have been forged.
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