The Cuyahoga County Down Payment Assistance Program is an effort to support homeownership for those whose income is in the low to moderate range. Step 1 – Treasurer's (Fiscal Office) Endorsement.Yes, you need a bill of sale. State the terms and odometer reading on the BOS. It may be wise to create a bill of sale, or a purchase agreement that you and the purchaser can each keep for your records. The first thing you'll need to do is obtain a bill of sale from the seller. An Ohio motor vehicle bill of sale form is a document used to transfer legal ownership of a car in the State of Ohio.