FinCEN, to comply with the congressional mandate to prescribe regulations under section 104(e) of the Comprehensive Iran Sanctions, Accountability, and Divestment Act of 2010 ("CISADA") and consistent with its statutory mission under 31 U.S.C. 310, is issuing this final rule. The rule requires a U.S. bank that maintains a correspondent account for a foreign bank to inquire of the foreign bank, and report to FinCEN certain information with respect to transactions or other financial services provided by that foreign bank. Under the rule, U.S. banks will only be required to report this information to FinCEN upon receiving a specific written request from FinCEN. This final rule follows publication of a May 2, 2011 proposed rule, takes into account the public comments received, and adopts the provisions of the proposed rule with minor modifications described in the preamble.