As recently as November 2014, individuals renouncing US citizenship waited up to 6 months for the official certificate of renunciation, while many renunciants, particularly those who renounced in consulates not located in the most common European cities such as London and Zurich, were never provided with a CLN and were told that the statement signed at the oath of renunciation is the only form given. Unofficial statements by the US State Department ascribe the problems to the fact that before 2010, the system was not efficiently designed and consular officers often improvised their own procedures based on the rough guidelines in their instructions. Since the 2010 enactment of the Foreign Account Tax Compliance Act (FATCA), the large increase in renunciations led the Department of State to re-organize the process so it is clear and follows the same steps in all consulates, although as of 2016, a backlog of several months still exists in many consulates.