You also need a collateral agreement (often called a UCC filing) if the sale includes physical assets. Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note.The contract will state the date at which the final transfer of ownership and possession of the business will occur, and when the seller will get the money. This Asset Purchase Agreement ("Agreement") is made effective as of December 14,. You will need a promissory note and security agreement that addresses the key terms of the seller note. What you need to know when negotiating the terms of the sale when buying or selling an LLC or Small Business in New York. Prior to the Closing the Purchaser shall notify the State of New York of the proposed sale of assets under this Agreement. Use this free customizable owner financing contract template to confirm financing between the owner selling a home and a buyer purchasing it. A business sale agreement is a legal document that describes and records the price and other details when a business owner sells the business.