Suspicious Activity Report (SAR)

The Suspicious Activity Report (SAR) is a tool provided under the Bank Secrecy Act (BSA) that monitors the suspicious activities that would not ordinarily be flagged under other transaction monitoring reports (such as the currency transaction report).
SARs can cover almost any activity that is out of the ordinary. A suspicious activity may be included in the SAR if the activity raises suspicion that the account holder is attempting to hide something or make an illegal transaction.