Seller financing requires: An asset purchase agreement between the seller and buyer. Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note.Contact us today for a confidential consultation. Once a value and purchase price have been detennined, the buyer and seller must structure the purchase price and agree on financing terms. The buyer often does. Call (215) 545-4830 - Danziger Shapiro, P.C. is dedicated to serving our clients with a range of legal services including Business and Corporate cases.