Section 14 in THE BHARATIYA SAKSHYA ADHINIYAM, 2023 – BSA

Existence of course of business when relevant.

14. When there is a question whether a particular act was done, the existence of any
    course of business, according to which it naturally would have been done, is a relevant fact.
    Illustrations.
    (a) The question is, whether a particular letter was dispatched. The facts that it was
    the ordinary course of business for all letters put in a certain place to be carried to the post,
    and that particular letter was put in that place are relevant.
    (b) The question is, whether a particular letter reached A. The facts that it was posted
    in due course, and was not returned through the Return Letter Office, are relevant.