In the aftermath of the economic crisis of 1997–1998, South Korea undertook a number of reforms in financial supervision. Questions have been raised, however, as to whether Korea has in fact succeeded in creating a system of financial supervision capable of dealing with certain risks and responding to new challenges. This article examines Korea's recent experience in financial instability resulting from misconduct by credit card companies as a case in point and argues that the postcrisis reform in financial supervision was limited to changing formal institutions for financial supervision and that further reforms will have to be undertaken in other related institutions if Korea is to improve its financial supervision.