The Bank Secrecy Act (BSA), codified at 31 U.S.C. § 5311 et seq., is the primary U.S. federal anti-money-laundering law — requiring financial institutions to maintain records, file Currency Transaction Reports (CTRs) for cash transactions over $10,000, and file Suspicious Activity Reports (SARs) when they detect potentially illicit activity.
The Bank Secrecy Act of 1970 (Pub. L. 91-508), codified at 31 U.S.C. §§ 5311–5336 and administered by the Financial Crimes Enforcement Network (FinCEN), created the foundational framework for U.S. anti-money-laundering compliance. BSA requirements apply to 'financial institutions' — a broad category that includes banks, credit unions, broker-dealers, money services businesses (MSBs), casinos, and in certain respects, non-bank mortgage lenders and commercial lenders. Core BSA obligations: (1) Currency Transaction Reports (CTRs) — must be filed with FinCEN for cash transactions exceeding $10,000 within a single business day (31 CFR § 1010.311). (2) Suspicious Activity Reports (SARs) — must be filed when a financial institution knows, suspects, or has reason to suspect that a transaction involves funds from illegal activity, is designed to evade reporting requirements, lacks a lawful purpose, or involves money laundering (31 CFR § 1020.320). (3) Customer Identification Program (CIP) — banks must verify the identity of any person seeking to open an account (31 CFR § 1020.220). (4) Beneficial Ownership requirements — since May 2018, covered financial institutions must collect beneficial ownership information for legal entity customers (31 CFR § 1010.230). FinCEN's BSA E-Filing System (bsaefiling.fincen.treas.gov) processes millions of CTRs and SARs annually. FinCEN uses this data for law enforcement referrals, including to the IRS Criminal Investigation, FBI, and DEA. Willful BSA violations carry civil penalties up to $1M+ per violation and criminal penalties up to $500K and 10 years imprisonment. For business borrowers: lenders subject to BSA will verify your identity, business ownership structure, and the source of funds at origination. Providing accurate information is not only a condition of approval — it is a legal obligation. See fincen.gov/resources/statutes-regulations/bank-secrecy-act for current BSA regulations and FinCEN guidance.
Directly, no — the BSA's obligations fall on financial institutions, not borrowers. But indirectly, yes: lenders subject to BSA will collect your identity information (CIP), verify beneficial ownership, and potentially file SARs if your transaction raises red flags. Providing false information to a BSA-covered lender can constitute a federal crime. See fincen.gov/resources/statutes-regulations/bank-secrecy-act for the full regulatory framework.
A Currency Transaction Report (CTR) is filed automatically for any cash transaction over $10,000 — no suspicion required, purely mechanical. A Suspicious Activity Report (SAR) is filed when the institution detects a transaction that appears to involve money laundering, fraud, or structuring — regardless of dollar amount. SARs are confidential: the institution cannot tip off the subject that a SAR has been filed. Both are filed through FinCEN's BSA E-Filing System at bsaefiling.fincen.treas.gov.
Structuring is the practice of deliberately breaking cash transactions into amounts below $10,000 to avoid triggering CTR filing — for example, making multiple $9,500 deposits instead of one $20,000 deposit. Structuring is a federal crime under 31 U.S.C. § 5324 regardless of whether the underlying funds are legitimate. It carries civil forfeiture of the funds and criminal penalties. See fincen.gov for FinCEN advisories on structuring.