Federal Defense Strategies: The Bank Secrecy Act (31 U.S.C. §§ 5311–5336)

The Bank Secrecy Act (BSA), officially titled the Currency and Foreign Transactions Reporting Act of 1970, serves as the United States' primary anti-money laundering (AML) statute.

Codified primarily in 31 U.S.C. §§ 5311–5336 and 12 U.S.C. §§ 1829b & 1951–1960, the BSA empowers the U.S. Department of the Treasury and the Financial Crimes Enforcement Network (FinCEN) to enforce mandatory recordkeeping and reporting obligations across the financial sector.

Federal prosecutors routinely leverage BSA non-compliance, failing to maintain an adequate AML program, and financial structuring allegations to initiate high-stakes criminal investigations, regulatory enforcement actions, and asset forfeiture proceedings.

What Is the Bank Secrecy Act?

The Bank Secrecy Act requires financial institutions and regulated commercial entities to assist federal agencies in detecting, tracking, and preventing illicit financial activities—including money laundering, tax evasion, health care fraud, and terrorist financing—by creating a traceable financial audit trail for cash and foreign transactions.

How the BSA Reporting System Works

Regulated Entities: Covered organizations—including commercial banks, credit unions, Money Services Businesses (MSBs), wire services, casinos, broker-dealers, and non-financial trade businesses—monitor daily customer transactions.
Mandatory Reporting Thresholds: When transactions meet specific statutory criteria, financial institutions must electronically submit formal disclosures to the government:
- Currency Transaction Reports (CTR): Submitted for single-day cash transactions exceeding $10,000.
- Suspicious Activity Reports (SAR): Submitted for transactions of any amount that suggest unlawful activity or attempts to evade reporting requirements.
- Reports of Foreign Accounts & Currency (CMIR/FBAR): Submitted for international currency movements or foreign holdings exceeding $10,000.
Anti-Money Laundering (AML) Compliance: Regulated entities must maintain internal controls, designate a BSA compliance officer, conduct independent audits, and train staff to detect suspicious patterns.
Federal Agency Action: Reports flow directly to the Financial Crimes Enforcement Network (FinCEN), which compiles financial intelligence for regulatory enforcement, IRS Criminal Investigation (IRS-CI), the FBI, and the Department of Justice (DOJ).

Covered Entities Under BSA Regulations

The scope of BSA compliance extends far beyond conventional commercial banks. Regulated entities include:

Banks, credit unions, and federal savings associations
Money Services Businesses (MSBs), wire transfer services, and cryptocurrency exchanges
Securities brokers, futures commission merchants, and dealers
Casinos, card clubs, and gaming operations
Precious metals, stone, and jewelry dealers
Insurance companies and real estate settlement services

Primary Reporting Requirements Under Federal Law

To comply with federal regulations, covered entities and individuals must submit specific statutory reports to FinCEN:

Currency Transaction Reports (CTR - 31 U.S.C. § 5313): Must be filed for any cash deposit, withdrawal, exchange, or payment exceeding $10,000 in a single business day. Multiple related transactions conducted in a single day that aggregate over $10,000 also trigger mandatory CTR filing.
Suspicious Activity Reports (SAR - 31 U.S.C. § 5318(g)): Must be filed when a financial institution detects or suspects that a transaction involves funds derived from illegal activity, lacks a reasonable business purpose, or attempts to evade federal reporting thresholds—regardless of the dollar amount.
Report of Foreign Bank and Financial Accounts (FBAR - 31 U.S.C. § 5314): Requires U.S. persons with a financial interest in or signature authority over foreign financial accounts exceeding $10,000 in aggregate value at any point during the calendar year to report those accounts electronically via FinCEN Form 114.
Report of International Transportation of Currency (CMIR - 31 U.S.C. § 5316): Requires filing when physically transporting, mailing, or shipping currency or monetary instruments exceeding $10,000 into or out of the United States.
Beneficial Ownership Information (BOI - Corporate Transparency Act / 31 U.S.C. § 5336): Mandates that reporting companies disclose beneficial ownership details to FinCEN to eliminate anonymous shell companies used for criminal concealment.

Federal Prohibition on Financial Structuring (31 U.S.C. § 5324)

One of the most frequently prosecuted federal financial crimes is structuring. Under 31 U.S.C. § 5324, it is a federal crime to intentionally break up, divide, or alter cash deposits or withdrawals into amounts under $10,000 specifically to prevent a financial institution from filing a mandatory CTR.

Critical Legal Warning: Federal prosecutors do not need to prove that the underlying cash was derived from illegal source activity. The act of structuring deposits to avoid reporting thresholds is an independent federal crime subject to criminal prosecution and federal asset forfeiture.

Civil and Criminal Penalties for BSA Violations

Violations of the Bank Secrecy Act carry severe administrative, civil, and criminal consequences enforced by the Department of Justice (DOJ), FinCEN, IRS Criminal Investigation (IRS-CI), and federal banking regulators.

Penalty Type	Legal Standard / Scope	Maximum Statutory Exposure
Civil Penalties (31 U.S.C. § 5321)	Non-willful or willful failure to file CTRs, FBARs, or maintain AML compliance programs	$10,000 per non-willful violation; up to $100,000 or 50% of account balance per willful FBAR violation; over $1 million per violation for systematic AML failures.
Criminal Penalties (31 U.S.C. § 5322)	Willful violations of BSA reporting laws or operating an unlicensed MSB	Up to 5 years in federal prison and fines up to $250,000 per violation.
Enhanced Criminal Penalties	BSA violations committed while violating another federal law or as part of a pattern of illegal activity involving > $100,000 in 12 months	Up to 10 years in federal prison and fines up to $500,000.
Asset Forfeiture (18 U.S.C. § 981 / 982)	Seizure of property and funds involved in structuring or illegal financial transactions	Civil and criminal forfeiture of all structured funds and property connected to money laundering.

Key Defense Strategies Against BSA and Structuring Charges

Defending individuals or institutions against BSA enforcement actions involves targeting the specific intent requirements and evidentiary foundation of the government's case:

Lack of Willfulness or Specific Intent: Proving that the defendant did not intentionally violate the law or act with knowledge that structuring was illegal (challenging the strict mental state required under Ratzlaf v. United States standards).
Legitimate Non-Criminal Purpose: Demonstrating that cash management practices were dictated by ordinary business practices, payroll needs, or lawful commercial transactions rather than an attempt to evade CTR filings.
Good-Faith Reliance on Professional Advice: Showing that financial reporting choices were made in reliance upon the guidance of certified public accountants (CPAs), tax attorneys, or compliance consultants.
Challenging Seizures and Civil Asset Forfeitures: Filing Fourth Amendment motions to suppress evidence or challenging overbroad administrative warrants executed against business or personal bank accounts.

Frequently Asked Questions (FAQs)

What is the primary purpose of the Bank Secrecy Act?

The Bank Secrecy Act requires financial institutions to establish recordkeeping and reporting systems that create an audit trail of large cash transactions and suspicious financial activity. This helps federal regulators and law enforcement agencies investigate money laundering, tax evasion, financial fraud, and international criminal activity.

What transactions trigger mandatory reporting under the BSA?

Cash transactions exceeding $10,000 conducted in a single business day trigger a mandatory Currency Transaction Report (CTR). Additionally, any transaction deemed suspicious—regardless of the monetary amount—requires the financial institution to submit a Suspicious Activity Report (SAR) to FinCEN.

What is a Suspicious Activity Report (SAR) under federal law?

A Suspicious Activity Report (SAR) is a confidential document filed by financial institutions with FinCEN when they detect transactions that appear suspicious, lack an apparent lawful purpose, or suggest potential money laundering, financial fraud, or tax evasion. Under federal law, financial institutions are strictly prohibited from notifying customers that a SAR has been filed.

What constitutes criminal structuring under 31 U.S.C. § 5324?

Structuring occurs when an individual or business intentionally conducts cash transactions in amounts below the $10,000 threshold (e.g., making consecutive cash deposits of $9,500) specifically to prevent a financial institution from filing a CTR. Structuring is a federal crime even if the cash was legally earned.

Which federal agency enforces compliance with the Bank Secrecy Act?

The Bank Secrecy Act is primarily administered by the Financial Crimes Enforcement Network (FinCEN), a bureau of the U.S. Department of the Treasury. The Department of Justice (DOJ), the Federal Bureau of Investigation (FBI), IRS Criminal Investigation (IRS-CI), and Homeland Security Investigations (HSI) handle criminal enforcement.

Contact Eisner Gorin LLP for BSA Defense Representation

Facing federal investigations, bank account seizures, or criminal indictments under the Bank Secrecy Act requires immediate, strategic intervention by qualified federal criminal defense counsel.

Based in Los Angeles, Eisner Gorin LLP represents financial institutions, corporate executives, business owners, and individuals facing high-stakes federal financial investigations across California and nationwide.

Our legal team intervenes early to challenge federal search warrants, negotiate with FinCEN and federal prosecutors, and defend against BSA or structuring allegations.

Phone: (818) 781-1570
Office Location: Los Angeles, California

Bank Secrecy Act