Ohio Revised Code Title XXIII. Courts Common Pleas § 2307.30

(A) A joint debtor may make a separate composition or compromise with any creditor. Any composition or compromise shall be a full and effectual discharge to the debtor who makes it, but only to that person, from all liability to the creditor with whom it is made, according to its terms. A debtor who makes such a composition or compromise may take from the creditor a note or memorandum in writing exonerating the debtor from all individual liability incurred by reason of the joint debt. That note or memorandum may be given in evidence to bar the creditor's right of recovery against the debtor. If joint liability is by judgment in a court of record in this state, on production to and filing of the note or memorandum with the clerk of the court, the clerk shall discharge the judgment of record as far as the compromising debtor is concerned.

(B) A compromise or composition with one joint debtor shall not discharge other joint debtors or impair the right of the creditor to proceed against other joint debtors who have not been discharged. A joint debtor who is proceeded against may counterclaim against the creditor for any demand that could have been asserted as a counterclaim had the suit by the creditor been brought against all of the joint debtors.

(C) A compromise or discharge of one joint debtor does not prevent the other joint debtors from availing themselves of any defense, except that they shall not set up the discharge of one debtor as a discharge of the others unless it appears that all were intended to be discharged. The discharge of one debtor is deemed a payment to the creditor equal to the proportionate liability of the discharged debtor.

(D) A compromise or composition by a joint debtor with a creditor does not affect any right the other joint debtors have to call on the discharged debtor for that person's ratable portion of the joint debt.