Suppose A purchases goods from B and wishes to give the latter his promissory note. B will not accept A's note unless A gets some one to sign with him to insure payment of the note when it becomes due. So A gets C to sign with him. Then A and C are "joint makers," and C is liable on the note if A refuses to pay it when it becomes due, whether he has been notified of A's failure to pay or not. This would be so even if he had signed his name on the back of the note, where an indorser does, before delivery to the payee.