The written instrument evidencing a retail installment sale and required by section 1317.02 of the Revised Code shall recite the following:
Divisions (D) and (F) may be added together and stated as one sum in the written instrument and if so stated division (E) may be omitted, but in such event the retail seller or the retail seller's successor in interest shall, within twenty-five days after the making of the retail installment contract, deliver personally, send by mail, or cause to be sent by mail, to the retail buyer at the retail buyer's address as shown on the retail installment contract, a statement reciting the separate amounts of divisions (D), (E), and (F). Division (F) may be stated as a rate, if said rate does not exceed eight per cent per annum straight interest, in which event the time balance provided in division (G) need not be stated.
The amount and date of each payment need not be separately listed if the payments are specified in terms of a series of payments of specified amounts, which amounts may state the principal amount plus the finance charge in terms of a rate at specified intervals of time from an initial date.
The initial date for the payment of the first installment may be a calendar date or may refer to the time of delivery or installation.
As used in this section "down payment" means that part of the payment of the cash price required by the retail seller as a condition to the delivery of the specific goods sold or to be sold or to the extension of credit to the retail buyer for any portion of the cash price.
R.C. § 1317.04