Ind. Code § 26-2-3-1

Sec. 1. All promissory notes, bills of exchange, bonds or other instruments in writing, signed by any person who promises to pay money, or acknowledges money to be due, or for the delivery of a specific article, or to convey property, or to perform any stipulation therein mentioned, shall be negotiable by endorsement thereon, so as to vest the property thereof in each endorsee successively.