In all cases when a mortgage has been assigned in writing on that mortgage, the recorder shall copy the assignment from the original mortgage. An Assignment Agreement is an effective legal document for transferring contractual obligations.General Code of Ohio, no assignment of, or order for wages or salary shall be valid if made after this section goes into effect. Fill out Notice of Assignment of Contract for Deed - Ohio online. The seller must fill in the proper name and address of the buyer, as well as the vehicle's sale date, selling price and odometer reading when applicable. The nature of the contract or the circumstances of the case, however, may bar assignment of the contract even where delegation of performance is not involved.