(38)In order to further mitigate conflicts of interest and facilitate fair competition in the credit rating market, it is important to ensure that the fees charged by credit rating agencies to clients are not discriminatory. Differences in fees charged for the same type of service should only be justifiable by a difference in the actual costs in providing this service to different clients. Moreover, the fees charged for credit rating services to a given issuer should not depend on the results or outcome of the work performed or on the provision of related (ancillary) services. Furthermore, in order to allow for the effective supervision of those rules, credit rating agencies should disclose to ESMA the fees received from each of their clients and their general pricing policy.