FinCEN analyzed 1,246 Bank Secrecy Act reports of suspected fentanyl related activity filed in 2024, covering about $1.4 billion in suspicious transactions (FinCEN trend analysis, 9 April 2025). Mexico and China were the top two foreign countries in the subjects' addresses. Orders against three Mexican institutions followed on 30 June 2025. Drug trafficking is one of the predicate crimes behind the money laundering typologies banks monitor for.
What does drug trafficking mean in law?
Table 1. AML legislation on drug trafficking and its role in combating the crime (as of October 2026).
| Jurisdiction | Rule | Acts covered | AML status |
|---|---|---|---|
| UN | 1988 Convention, Article 3(1) | Production, manufacture, extraction, preparation, offering, sale, distribution, delivery, brokerage, dispatch, transport, import or export; possession or purchase for those acts; organizing, managing or financing them | Article 3(1)(b) makes converting or hiding the proceeds an offense too |
| US | 21 U.S.C. 841(a) and 960 | Manufacturing, distributing or dispensing a controlled substance, or possessing it with intent to; importing or exporting it | Specified unlawful activity for federal money laundering law |
| UK | Misuse of Drugs Act 1971, sections 4 and 5(3) | Producing, supplying or offering to supply a controlled drug; possessing it "with intent to supply it to another" | Listed under "Drug trafficking" in POCA 2002 Schedule 2, England and Wales |
| EU | Framework Decision 2004/757/JHA; Directive (EU) 2018/1673, Article 2(1)(e) | Illicit trafficking in narcotic drugs and psychotropic substances | A predicate offense category for money laundering |
| FATF | Glossary, June 2026 | "illicit trafficking in narcotic drugs and psychotropic substances" | A designated category of offenses |
The legal definition is wider than smuggling. The Convention also covers brokerage, offering for sale, possession for supply and financing, so a broker who never touches the drugs and a lender who funds a shipment both commit the offense.
That predicate status is why the subject reaches banks. Money from any of these acts is criminal property; in the US, 18 U.S.C. 1956 also reaches drug offenses committed abroad, so knowingly handling the proceeds can be laundering, and a bank that suspects it files a report.
How did three Mexican institutions get cut off from US transfers?
On 30 June 2025 FinCEN found CIBanco, Intercam Banco and Vector Casa de Bolsa, all Mexican financial institutions, "of primary money laundering concern in connection with illicit opioid trafficking" (90 FR 27770 and two companion orders). Each order rests on 21 U.S.C. 2313a and was, in FinCEN's words, "one of the first issuances of an order under section 2313a".
FinCEN pushed the start date twice, to 4 September and then 20 October 2025 (90 FR 40974). On 16 April 2026 it amended the CIBanco order to allow payments the Government of Mexico needs to liquidate CIBanco (91 FR 20362).
What the orders ask is simple to state. "A covered financial institution is prohibited from engaging in any transmittal of funds from or to CIBanco", with the same wording for the other two and "no cessation date". A US bank therefore has to find every payment that runs to or from the named institution and stop it. That makes it a payments control: the bank needs the institution's names and identifiers in its payment checks from the start date.
How is drug money laundered?
Drug money moves through the three main phases of money laundering, each with its own drug pattern:
- Placement. Street cash goes into banks in amounts kept under the reporting line, which is structuring, often into one account fed from many branches.
- Layering. Dollars are swapped for pesos through the black market peso exchange, or passed through money mules and trade payments. FinCEN's 2025 analysis found precursor chemical purchases paid by bank wires, money transfer services and convertible virtual currency.
- Integration. Proceeds return as business income through front companies, property or loans.
Wire and other electronic transfers appeared in 80 percent of the fentanyl reports FinCEN analyzed, the most common payment method, so drug money is not only a cash problem.
The same analysis names two cartels, the Sinaloa Cartel and CJNG, whose strongholds Sinaloa and Jalisco were the top two Mexican states in the reports' subject addresses.
Which red flags point to drug proceeds?
Table 2. Red flags for drug proceeds, with the rule behind each.
| Red flag | Logic | Threshold | Note |
|---|---|---|---|
| Funnel account | Cash deposits in one area, withdrawals in another, little time between | None set; geography and speed | FinCEN's definition, 2014 |
| Deposits under the cash line | Repeated cash deposits just below $10,000 | Under $10,000 each | Structuring to evade reporting is a crime (31 U.S.C. 5324) |
| Reporting avoided across branches | One customer's cash split over branches or days | Total currency of more than $10,000 in one business day needs a CTR | 31 CFR 1010.311, with multiple transactions added together under 1010.313 |
| Trade paid by unrelated parties | Goods paid for by people with no link to the buyer | None set | Trade based money laundering |
| Mule accounts | New accounts that take in cash or transfers and pass them on fast | None set | CDD on the account holder shows whether the volume fits |
| Crypto to darknet markets | Transfers to services linked to drug sales | None set | FinCEN's 2025 analysis found bitcoin payments in suspected darknet marketplace drug sales |
FinCEN's advisory of 28 May 2014 defines a funnel account as "An individual or business account in one geographic area that receives multiple cash deposits, often in amounts below the cash reporting threshold, and from which the funds are withdrawn in a different geographic area with little time elapsing between the deposits and withdrawals." Drug cash rarely arrives as one large deposit, so the signal is the geography of the deposits and the speed of the outflow, not the size of any one deposit.
CDD gives each flag its context. Picture, as an illustration, two accounts that each take $8,000 in cash a week: a restaurant whose deposits match its card sales and its town, and a personal account fed from branches in three states and emptied by wire the next day. Only the second fits the funnel pattern.
The methods and technologies for catching these patterns are monitoring rules plus that customer context. complead, formerly Sanction Scanner, provides transaction monitoring with a typology library that ships ready, and a rule can be tested against the firm's own history before it is published; the analyst still decides what becomes a report.
Who acts against drug trafficking and its money?
International organizations and national agencies split the work. UNODC tracks the market and supports the 1988 Convention. Its World Drug Report 2026 estimates that 331 million people used a drug in 2024. In the US, the DEA and the FBI pursue the traffickers, while FinCEN receives the suspicious activity reports that banks file and issues orders such as the three above. Other countries' financial intelligence units do the same job, and the FATF keeps drug trafficking among the designated categories of predicate offenses that countries' laws should cover.
Which actions on drug money came in 2025 and 2026?
- 9 April 2025: FinCEN's fentanyl trend analysis.
- 30 June 2025: the three section 2313a orders.
- 20 October 2025: the orders took effect.
- 16 April 2026: the CIBanco amendment for its liquidation.
- June 2026: UNODC's World Drug Report 2026.
For an analyst, the decision is whether a cash pattern is a funnel account worth a SAR, judged on where the deposits are made and how fast the money leaves.
Related terms
- Black market peso exchange (BMPE). Swapping drug dollars for pesos through brokers.
- Structuring. Splitting cash to stay under a reporting line.
- Money mule. A person who moves criminal money through their account.
- Trade based money laundering (TBML). Moving value through invoices and goods.
- Layering. The stage that hides where the money came from.
- Human trafficking. Another predicate crime that leaves traces in accounts.
How this entry was checked. The definition follows Article 3 of the 1988 UN Convention. The author, Sinan Tekin (Regional Sales Manager at complead), checked it, and the national lines, against 21 U.S.C. 841 and 960, 18 U.S.C. 1956, the UK Misuse of Drugs Act 1971 and Proceeds of Crime Act 2002 (Schedule 2), Directive (EU) 2018/1673 and the FATF Glossary (June 2026), then read FinCEN's section 2313a orders of 30 June 2025 with their 2025 extensions and the amendment of 16 April 2026, FinCEN's trend analysis of 9 April 2025, its advisory of 28 May 2014 and UNODC's World Drug Report 2026. Javid Khasayev, Senior Anti Fraud Specialist at GoldenPay, goes over the same list before the entry is published. Last reviewed: 30 October 2026.
