My bank wants purchase agreement or bill of sale before sending out a check to the dealer. Most require the buyer to have a title and bill of sale.I'm new to car financing. What got me confused is that my bank wants purchase agreement or bill of sale before sending out a check to the dealer. Once you and the dealer agree on the price, notify your lender with the details from the purchase agreement. The final hurdle you face is signing the vehicle purchase agreement; a confusing and convoluted document that we explain in detail here. Watch this before you finance your next car (former dealer explains how to read a purchase contract) Dealer Deputy, or its Dealer Deputy's Representative shall remit motor vehicle registration fees to the Tax Assessor-Collector as provided under this Agreement.