A type of financial statements represent the most basic level of service CPAs provide with respect to financial statements. In a compilation, the CPA must comply with certain basic requirements of professional standards, such as having a knowledge of the client's industry and applicable accounting principles, having a clear understanding with the client as to the services to be provided, and reading the financial statements to determine whether there are any obvious departures from generally accepted accounting principles (or, in some cases, another comprehensive basis of accounting used by the entity). It may be necessary for the CPA to perform "other accounting services" - such as creating your general ledger, or assisting you with adjusting entries for your books - before the financial statements can be prepared. Upon completion, a report on the financial statements is issued that states a compilation was performed in accordance with AICPA professional standards, but no assurance is expressed that the statements are in conformity with generally accepted accounting principles. This is known as the expression of "no assurance." Compiled financial statements are often prepared for privately held entities that do not need a higher level of assurance expressed by the CPA.