Record either video or audio evidence supporting their ability to complete the Contract of Sale document, or other document relevant to their state or territory of operation (where applicable), with the vendor and buyer. This includes: Explaining the Privacy Act to both parties, ensuring they understand the gathering, storage and use of their personal information, including that their information is only needed for the sale and will not be used for other purposes without their expressed written consent. For example, information such as: name, address, financial transactions, contact number, and so on