Suspicious Activity Report Explained: Meaning, Types, Process, and Use Cases
A Suspicious Activity Report (SAR) is a formal compliance report used by financial institutions to notify authorities when account behavior, payment activity, or transaction patterns appear suspicious. It is one of the most important tools in anti-money laundering and counter-terrorist financing controls because firms are expected to recognize and escalate suspicion even when they cannot prove a crime. In U.S. banking, the term has a specific regulatory meaning; in other jurisdictions, closely related concepts may appear under names such as Suspicious Transaction Report (STR).