Use this free customizable owner financing contract template to confirm financing between the owner selling a home and a buyer purchasing it. A seller financing agreement should be detailed and comprehensive, outlining all terms and conditions clearly.Essential elements include:. Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note. A business sale agreement is a legal document that describes and records the price and other details when a business owner sells the business.