Basic requirement

You must file with FinCEN a “suspicious activity report” (SAR) under any of the circumstances described in the next section. FinCEN is the Financial Crimes Enforcement Network, which is part of the federal Department of Treasury. Effective July 1, 2012, filing of most reports required by FinCEN must be done electronically. A financial institution that files a report, such as an SAR, must register as an E filer by visiting the following link: http://bsaefiling.fincen.treas.gov/main.html.