s 49 Opinion as to handwriting when relevant
49. 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 or she has seen that person write, or when he or she has received documents purporting to be written by that person in answer to documents written by himself or herself or under his or her 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 or her. Illustrations The question is whether a given letter is in the handwriting of A, a merchant in London. B is a merchant in Singapore, who has written letters addressed to A and received letters purporting to be written by A. C is B’s clerk, whose duty it 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 him or her 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.