investigated whether mandatory rotation rules affect audit quality in sample evidence from three countries over a number of years (Italy, South Korea, and Brazil) by using an international perspective on sample evidence that includes data from 1991 to 2010. They conclude that the auditor-client relationship is going to threat the auditor's independence and increase the concern about the constant profit flow as the audit firm will consider this relationship as a long-term contract between them and the client. Another issue is due to the long auditor tenure, the auditor is going to anticipate errors and evidences because of the prior experience in the company, this threat called “familiarity threat”. The auditors should collect new and innovative audit evidence.