Compliance with Bank Secrecy Act (BSA) and Anti-Money Laundering (AML) provisions continues to be a major challenge for banks pursuing mergers and acquisitions. Several large banks recently received enforcement actions from regulators for weaknesses in their BSA/AML programs, forcing them to delay or terminate deals. Falling short of BSA/AML compliance can be very costly, with billions in fines. The regulatory focus on BSA/AML seems unlikely to ease soon given increasing law enforcement reliance on banks' reporting of suspicious transactions.