US urges banks to report suspected Iranian money laundering tied to crypto networks

The US Treasury Department has issued fresh guidance telling banks to watch for, and report, suspected money laundering networks tied to the Iranian Revolutionary Guard Corps. The directive specifically flags the use of shell companies and cryptocurrency networks as key channels for moving illicit funds.

At the center of the guidance is Iran’s sanctioned oil trade, estimated to exceed $10 billion annually as of 2025, that continues to flow despite years of escalating financial restrictions.

Shell companies, fake oil labels, and crypto

The advisory lays out a set of red flags for financial institutions to monitor. Newly established companies moving large sums of money should draw immediate suspicion, especially when those transfers connect to Iranian crypto firms.

On the physical side, the Treasury warns about oil shipments mislabeled as “Malaysian blend” and falsified shipping documentation designed to obscure the origin of Iranian crude. Opaque ship-to-ship transfers, where cargo changes vessels at sea to break the chain of custody, are another indicator banks should watch for.

Neither specific cryptocurrencies nor individual companies were named in the guidance.

Secondary sanctions as leverage

In April 2026, the Treasury warned financial institutions in key regions about secondary sanctions for engaging with Iranian businesses. Chinese banks received particular attention, with the Treasury threatening consequences if any financial flows linked to Iran were detected.

The FATF and UN Security Council have both previously highlighted Iranian banks for potential money laundering activities. Recent trends show a shift towards digital assets, as networks linked to the IRGC are reported to convert oil revenues into cryptocurrency for international movement.

What this means for crypto and banking compliance

Enhanced due diligence means more staff, more technology, and more friction in onboarding customers. Compliance risks are likely to rise for banks involved with crypto transactions from high-risk jurisdictions, potentially resulting in higher KYC and AML costs, and could lead to decreased liquidity in affected trading pairs, though immediate price volatility has not been observed as of May 2026.