Section 121 in The Negotiable Instruments Act

Title: Estoppel against denying capacity of payee to indorse

Description: No maker of a promissory note and no acceptor of a bill of exchange 1[payable to order] shall, in a suit thereon by a holder in due course, be permitted to deny the payee's capacity, at the date of the note or bill, to indorse the same. 1. Subs. by Act 8 of 1919, s. 5, for payable to, or to the orderof, a specified person.

Title: Estoppel against denying signature or capacity of prior party

Description: No indorser of a negotiable instrument shall, in a suit thereon by a subsequent holder, be permitted to deny the signature or capacity to contract of any prior party to the instrument.

Title: Cheque crossed generally

Description: Where a cheque bears across its face an addition of the words "and company" or any abbreviation thereof, between two parallel transverse lines, or of two parallel transverse lines simply, either with or without the words "not negotiable", that addition shall be deemed a crossing, and the cheque shall be deemed to be crossed generally.

Title: Cheque crossed specially

Description: Where a cheque bears across its face an addition of the name of a banker, either with or without the words "not negotiable", that addition shall be deemed a crossing and the cheque shall be deemed to be crossed specially, and to be crossed to that banker.

Title: Crossing after issue

Description: Where a cheque is uncrossed, the holder may cross it generally or specially. Where a cheque is crossed generally, the holder may cross it specially. Where a cheque is crossed generally, or specially, the holder may add the words "not negotiable". Where a cheque is crossed specially, the banker to whom it is crossed may again cross it specially to another banker, his agent, for collection.