Ohio Rev. Code § 5817.14: Admissibility of evidence.

(A) The finding of facts by a court in a proceeding brought under this chapter is not admissible as evidence in any proceeding other than a proceeding brought to determine the validity of a will or trust.

(B) The determination or judgment rendered in a proceeding under this chapter is not binding upon the parties to that proceeding in any action that is not brought to determine the validity of a will or trust.

(C) The failure of a testator to file a complaint for a judgment declaring the validity of a will that the testator has executed is not admissible as evidence in any proceeding to determine the validity of that will or any other will executed by the testator.

(D) The failure of a settlor to file a complaint for a judgment declaring the validity of a trust that the settlor has executed is not admissible as evidence in any proceeding to determine the validity of that trust or any other trust executed by the settlor.