Ohio Rev. Code § 4925.08: Cash payments.

(A) A transportation network company driver may accept cash payments for transportation network company services if authorized to do so by the transportation network company that controls the digital network through which the driver provides the services. If a transportation network company driver accepts a cash payment for a transportation network company service, the driver shall notify the transportation network company through the digital network that a cash payment has been made and of the amount of the cash payment. In addition, the rider shall confirm the amount of the cash payment through the digital network. Nothing in this section shall be construed to require a transportation network company to authorize the acceptance of cash payments.

(B) No transportation network company driver shall solicit or accept any passenger other than through the digital network of the transportation network company at any time during which the transportation network company driver is logged onto the digital network.