(A) Except as otherwise provided in this section, a municipal or county court or court of common pleas does not have jurisdiction to modify and interrupt the processing of an order of garnishment of personal earnings that that court issued in a proceeding in garnishment of personal earnings under this chapter unless all of the following apply:

1. (1) The judgment creditor and the judgment debtor associated with that order jointly apply to that court for the modification and interruption.
2. (2) That judgment creditor and judgment debtor jointly agree that the amount of the judgment debtor's personal disposable earnings that is required to be withheld during each pay period under that court's order should be modified to a mutually agreed upon and specified amount and that the garnishee should withhold that specified amount until the judgment in favor of the judgment creditor and the associated court costs, judgment interest, and, if applicable, prejudgment interest awarded to the judgment creditor have been paid in full or until that court's order otherwise ceases to remain in effect under division (C)(1) of section 2716.041 of the Revised Code.
3. (3) That court enters an order that approves of the modification described in division (A)(2) of this section and causes a copy of that order to be served upon the garnishee in the same manner as process is served.