Ohio Revised Code Title XIII. Commercial Transactions § 1313.42

Each person presenting and filing a claim against the estate of the debtor, before it is allowed or any payments made thereon, must make and file an affidavit setting forth that the claim is just and lawful, the consideration thereof, and what counterclaims exist thereto;  what collateral or personal security the claimant holds for the claim, or that he has no security.  The assignee or trustee for the benefit of creditors, or a creditor may examine the claimant under oath touching such collateral or other security, or any other matter relating to his claim, within such time and under such regulations as are prescribed by the probate judge.  A surety of, or person jointly liable with, the assignor, may be allowed to present and prove the claim on which he is so bound;  but the dividend thereon shall be payable to the party holding it.  If the latter proves such claim, then the allowance and dividend on it must be as proved by him.