Negotiable Instruments Act, 1881
No notice of dishonour is necessary— (a) when it is dispensed with by the party entitled thereto; (b) in order to charge the drawer, when he has countermanded payment; (c)when the party charged could not suffer damage for want of notice; (d) when the party entitled to notice cannot after due search be found; or the party bound to give notice is, for any other reason, unable without any fault of his own to give it; (e) to charge the drawers, when the acceptor is also a drawer; (f) in the case of a promissory note which is not negotiable; (g) when the party entitled to notice, knowing the facts, promises unconditionally to pay the amount due on the instrument.