Negotiable Instruments Law
Section 104. Where parties reside in different places.- Where the person giving and the person to receive notice reside in different places, the notice must be given within the following times:
(a) If sent by mail, it must be deposited in the post-office in time to go by mail the day following the day of dishonor, or if there be no mail at a convenient hour on that day, by the next mail thereafter.
(b) If given otherwise than through the post-office, then within the time that notice would have been received in due course of mail, if it had been deposited in the post-office within the time specified in the last subdivision.