Ohio Rev. Code Ann. § 1303.03
(A) Except as provided in divisions (C) and (D) of this section, "negotiable instrument" means an unconditional promise or order to pay a fixed amount of money, with or without interest or other charges described in the promise or order, if it meets all of the following requirements:
(3) It does not state any other undertaking or instruction by the person promising or ordering payment to do any act in addition to the payment of money, but the promise or order may contain any of the following:
(E)
(F) "Check" means either of the following:
(I) "Traveler's check" means an instrument that meets all of the following conditions: