In a recent SEC filing Facebook has admitted that as of June 30 approximately 8.7% of its 955 million accounts worldwide are, in fact, duplicates or have erroneously been created -- essentially 83 million of them. In its recent filing the company revealed the following: We estimate that "duplicate" accounts (an account that a user maintains in addition to his or her principal account) may have represented approximately 4.8% of our worldwide MAUs as of June 30, 2012. As of June 30, 2012, we estimate user-misclassified accounts may have represented approximately 2.4% of our worldwide MAUs (monthly active users) and undesirable accounts may have represented approximately 1.5% of our worldwide MAUs. We believe the percentage of accounts that are duplicate or false is meaningfully lower in developed markets such as the United States or Australia and higher in developing markets such as Indonesia and Turkey. However, these estimates are based on an internal review of a limited sample of accounts and we apply significant judgment in making this determination, such as identifying names that appear to be fake or other behavior that appears inauthentic to the reviewers. As such, our estimation of duplicate or false accounts may not accurately represent the actual number of such accounts. First, Facebook deserves a considerable amount of credit for its acknowledgement of its user base discrepancy. This suggests that it is nothing like Enron. What's more, the company has waged an unrelenting commitment to improving its ability to spot these false user accounts and put corrective actions in place.