The documents you need to buy or sell a business depend on the structure (discussed here) and complexity of the deal as well as its specific terms. If you transfer the ownership of your property, the Assessor receives a copy of the deed and determines if a reassessment for property tax purposes is required.Identify the parties involved in the transaction. 2. This article discusses seven (7) types of seller liabilities that should concern a buyer when negotiating the purchase of a California business. An APA, or Asset Purchase Agreement, is a contract in which a buyer and seller agree to the transfer of ownership for an asset at an agreed price. From BOLT TECHNOLOGY CORP filed with the Securities and Exchange Commission.