Ohio Rev. Code Ann. § 3121.12
(A) On receipt of a notice that a lump sum payment of one hundred fifty dollars or more is to be paid to the obligor, the child support enforcement agency shall do either of the following:
(C) In the case of a notice of a lump sum payment made in accordance with a support order issued prior to January 1, 1998, requiring an employer to withhold an amount from an obligor's personal earnings for the payment of support, the agency that receives notification of the lump sum payment from the payor shall notify the court that issued the order, and the court shall issue a supplemental order that does not change the original order or the related support order requiring the employer to do all of the following: