764 Signature essential to hahility. Forged or unauthorised signature, DProcuration signature-. Terson sipning as agent or in represen- tative capacity. Ch. 31. No. 5.] Bills of Exchange. corporation to make itself liable as drawer, acceptor, or indorser of a bill unless it is competent to it so to do under the law for the time being in force relating to corporations. (2) Where a bill is drawn or indorsed by an infant, minor, or corporation having no capacity or power to incur hability on a bill, the drawing or indorsement entitles the holder to receive payment of the bill, and to enforce it against any other party thereto. 23. No person is liable as drawer, indorser, or acceptor of a bill who has not signed it as such: Provided that— (a2) where a person signs a bill in a trade or assumed name, he is liable thereon as if he had signed it in his own name; (b) the signature of the name of a firm is equivalent to the signature by the person so signing of the names of all persons liable as partners in that firm. 24. Subject to the provisions of this Ordinance, where a signature on a bill is forged or placed thereon without the authority of the person whose signature it purports to be, the forged or unauthorised signature is wholly inoperative, and no right to retain the bill or to give a discharge therefor or to enforce payment thereof against any party thereto can be acquired through or under that signature, unless the party against whom it is sought to retain or enforce payment of the bill is precluded from setting up the forgery or want of authority: Provided that nothing in this section shall affect the ratification of an unauthorised signature not amounting to a forgery. 25. A signature by procuration operates as notice that the agent has but a limited authority to sign, and the principal is only bound by such signature if the agent in so signing was acting within the actual limits of his authority. 26. (1) Where a person signs a bill as drawer, indorser, or acceptor, and adds words to his signature, indicating that he signs for or on behalf of a principal, or in a representative