You can ask potential buyers to fill out a questionnaire or provide them with an information sheet to complete. Purchase and Sale Contracts and Transfer Agreements legally transfer the ownership of a business or some of its assets to a new owner.Client Service Contracts. Use a California business purchase agreement to record the sale of a business. Download your free template today. Renting property: All property owners in Oakland who wish to rent out their property must file and obtain a business tax certificate. A BuySell Agreement sets out the method for valuing the business and business assets in the event of a sale.