Ohio Rev. Code Ann. § 5741.01
As used in this chapter:
(G)
(I)
(2) "Substantial nexus with this state" is presumed to exist when the seller does any of the following:
(c) Uses any person, other than a common carrier acting in its capacity as a common carrier, in this state for any of the following purposes:
(4) A marketplace facilitator is presumed to have substantial nexus with this state if either of the following apply in the current or preceding calendar year:
(6) As used in division (I) of this section:
(W) A sale is "facilitated" by a marketplace facilitator on behalf of a marketplace seller if it satisfies divisions (W)(1), (2), and (3) of this section:
(1) The marketplace facilitator, directly or indirectly, does any of the following:
(2) The marketplace facilitator, directly or indirectly, does any of the following: