Indian Evidence Act, 1872
16. Existence of course of business when relevant
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 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 Dead Letter Office, are relevant.