In the European framework set up by the Directive 2006/43/CE and adopted in Italy with the Legislative Decree (D. Lgs.) No. 39/2010, the issue of auditor independence is confirmed among the key topics for the credibility of the statutory auditing function and, as a consequence, for the reliability of financial statements. Starting from the distinction between auditor independence in fact and in appearance, this paper analyses the regulatory policy aiming at increasing the disclosure on the auditor-client relationship. Disclosure about this relationship can contribute to the knowledge of potential conflict of interest that in turn can impair auditor independence. In this context,a specific relationship has been empirically investigated: the ...