50. The performance of any promise may be made in any manner, or at any time which the promisee prescribes or sanctions.Illustrations (a) B awes A 2,000 Taka. A desires B to pay the amount to A's account with C, a banker. B, who also banks with C, orders the amount to be transferred from his account to A's credit, and this is done by C. Afterwards, and before A knows of the transfer, C fails. There has been a good payment by B. (b) A and B are mutually indebted. A and B settle an account by setting off one item against another, and B pays A the balance found to be due from him upon such settlement. This amounts to a payment by A and B, respectively, of the sums which they owed to each other. (c) A owes B 2,000 Taka. B accepts some of A's goods in reduction of the debt. The delivery of the goods operates as a part payment. (d) A desires B, who owes him Taka 100, to send him a note for Taka 100 by post. The debt is discharged as soon as B puts into the post a letter containing the note duly addressed to A.