You get the highest level of assurance because we go outside your company to obtain more information. Typically, we'll have written communication with: We also perform physical inspections by observing your inventory counting methods and perform test counts. We document and test each operating cycle, including sales and cash receipts, expenses and cash disbursements, and payroll. Our audit papers include a detailed work program to document the examinations and testing performed, as well as the client's supporting work papers.