Ohio Revised Code Title XXXI. Domestic Relations Children § 3121.20

(A) A payor or financial institution required to withhold or deduct a specified amount from the income or savings of more than one obligor under a withholding or deduction notice described in section 3121.03 of the Revised Code and to forward the amounts withheld or deducted to the office of child support may combine all of the amounts to be forwarded in one payment if the payment is accompanied by a list that clearly identifies all of the following:

(B) A payor who employs more than fifty employees and who is required to submit the withholding by electronic transfer pursuant to sections 3121.037 and 3121.19 of the Revised Code shall combine all of the amounts to be forwarded in one payment. The payment shall be accompanied by information that clearly identifies all of the following: