Vehicle Payment Plan Agreement. A vehicle payment plan agreement is a contract between a buyer and seller of a vehicle that agrees to installment payments.From what to expect in a typical loan agreement to what to watch out for, we'll help you feel confident when it comes time to sign on the dotted line. Sufficient income, credit and a history of paying debts on time are among the top criteria lenders seek in an applicant. Filling in a Blank Ohio Promissory Note: Everything You Should Know. 2023 Form OH DPS BMV 3772 Fill Online Printable Fillable Blank. Ohio Loan fashion Agreement for Vehicle. When you buy a car at the dealership, you'll need to sign the car purchase or sale agreement along with other documents. Find out what you'll sign and why. Can you back out of a car loan if you didn't drive the car off the lot?