On October 22, FinCEN issued advisory guidance to financial institutions for filing Suspicious Activity Reports (SARs) on conduct related to third-party payment processors. The FinCEN guidance lists several potential red flags with regard to these payment processors, including (i) fraud, (ii) accounts at multiple financial institutions, (iii) money laundering, (iv) enhanced risk, (v) solicitation for business, and (vi) elevated rate of return of unauthorized debit transactions. To identify suspicious activity involving payment processors, FinCEN suggests that financial institutions review and update their anti-money laundering programs, monitor whether legal actions are pending against payment processors, and verify that payment processors have all required state licenses and registrations. In addition, financial institutions may be required to file SARs if they know or suspect that a payment processor has conducted a transaction involving funds derived from illegal activity, or where a payment processor has attempted to disguise funds derived from illegal activity. When completing SARs related to payment processors, FinCEN requests that financial institutions (i) check the appropriate box on the SAR form indicating the type of suspicious activity, and (ii) include the term “Payment Processor” in the narrative and the subject occupation portions of the SAR.