- Complete the back side as an assignment and authorization for payoff. The vehicles owner(s) must sign, print name, date, and disclose the mileage on the form.A Massachusetts bill of sale allows a seller to transfer ownership of personal property in exchange for cash or trade. This episode is ALL about wholesale purchase contracts!! The primary purpose of a bill of sale is to confirm the terms and provide evidence of the transaction between the seller and buyer. 1. 1. Fill in the seller's and buyer's full names and contact information. Call 203-878-1241 For Quote. Section 9: Delivery and preparation obligations; express warranty agreements; audit of claims. In general, Massachusetts has strong consumerprotection laws. Who Is Needed To Complete A Wholesale Real Estate Contract?