When the Court has to form an opinion as to the person by whom any document was written or signed, the opinion of any person acquainted with the handwriting of the person by whom it is supposed to be written or signed that it was or was not written or signed by that person, is a relevant fact.
Explanation. - A person is said to be acquainted with the handwriting of another person when he has seen that person write, or when he has received documents purporting to be written by that person in answer to documents written by himself or under his authority and addressed to that person, or when, in the ordinary course of business, documents purporting to be written by that person have been habitually submitted to him.
Illustration
The question is, whether a given letter is in the handwriting of A, a merchant
in London.
B is a merchant in Calcutta, who has written letters addressed to A and received
letters purporting to be written by him. C, is B's clerk whose duty to was to
examine and file B's correspondence. D is B's broker, to whom B habitually
submitted the letters purporting to be written by A for the purpose of advising
with him thereon.
The opinions of B, C and D on the question whether the letter is in the handwriting of A are relevant, though neither B, C nor D ever saw A write.
Section 41 Relevancy of certain judgments in probate, etc., jurisdiction
Section 43 Judgments, etc., other than those mentioned in sections 40, 41 and 42, when relevant
Section 44 Fraud or collusion in obtaining judgment, or incompetency of Court, may be proved
Section 45 Opinions of experts
Section 45A Opinion of Examiner of Electronic Evidence
Section 46 Facts bearing upon opinions of experts
Section 47 Opinion as to handwriting, when relevant
Section 47A Opinion as to digital signature, when relevant
Section 48 Opinion as to existence of right or custom, when relevant
Section 49 Opinion as to usages, tenets, etc., when relevant