Structuring (Smurfing)

Structuring arose in the United States after the 1970 Bank Secrecy Act created the $10,000 cash-reporting rule; Florida drug investigators coined 'smurfing' in the early 1980s and Congress criminalised structuring in 1986.

Structuring became a crime because of the US Bank Secrecy Act of 1970, which requires banks to file a Currency Transaction Report for cash transactions over $10,000. Criminals responded by splitting cash into sub-$10,000 deposits, often using many runners - 'smurfs', a term coined by Florida drug investigators in the early 1980s. Congress made structuring itself an offence in 1986 (31 U.S.C. 5324), and the Supreme Court's 1994 Ratzlaf decision led to a 1994 amendment removing the need to prove the defendant knew structuring was illegal. The best-known conviction is former House Speaker Dennis Hastert, sentenced in 2016 for structuring withdrawals to pay hush money.

Cash from drugs, tax evasion, fraud or simply undeclared income is broken into deposits or withdrawals just under the $10,000 reporting threshold, spread across days, branches, accounts and people so no single transaction triggers a Currency Transaction Report. Modern variants use many low-value money orders, prepaid cards or crypto ATM purchases. Banks are required to file Suspicious Activity Reports on patterns that look like structuring, and those reports - not the CTRs the scheme avoids - are what usually lead to prosecution. Structuring is a crime even when the money is legal.

It requires nothing but patience and, for large sums, a few runners; small operators split deposits themselves. It is effective against automatic CTRs but not against bank SAR filings, which flag the pattern, and because intent to evade reporting is enough, prosecutors often use it when they cannot prove the underlying crime (as with Hastert). Sentences for stand-alone structuring are usually months or probation.

No body publishes a total for structured cash; the offence is a reporting evasion and losses accrue to the underlying crimes (drugs, tax evasion, fraud). The most prominent case is Dennis Hastert's $1.7 million (2016); the largest recent pleas involve $250,000 to over $1 million. Non-money harm: structuring hides drug and fraud proceeds from investigators, and civil forfeiture of structured legal funds has drawn criticism from small-business owners.