Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note. Seller financing, or seller note, occurs when an owner serves as a lender and funds a percentage of the purchase price for a business acquisition.Here is an example of what a business purchase agreement might look like. Seller financing refers to when the seller of a business provides part or all of the financing for the buyer to complete the acquisition. Seller financing allows business buyers and sellers to remove the middleman (bankers) and work together directly to come up with a funding deal.