U.S. Treasury Warns Banks Handling Iranian Money in Oman, UAE, Hong Kong and China
U.S. Treasury letters warn banks handling Iranian money that they may face secondary sanctions, as Washington moves to cut Tehran off from the global financial system.
The U.S. Department of the Treasury has sent formal letters to financial institutions in Oman, the United Arab Emirates, Hong Kong and mainland China notifying them that evidence exists of Iranian funds moving through their systems for illicit purposes. (apnews.com)
Treasury Sends Warning Letters to Banks
The letters, reviewed by international news agencies, caution foreign banks that continued facilitation of Iranian transactions could lead to secondary sanctions that would restrict their access to the U.S. financial system. (apnews.com)
A senior U.S. official described the correspondence as an initial step in enforcement aimed at disrupting financial channels that, according to Treasury investigators, have been used to fund prohibited activities. The move is part of a broader pressure campaign by Washington to choke off revenue streams to Tehran. (apnews.com)
Scope and Targets Named in the Notice
Officials identified a pattern of transactions routed through correspondent accounts and shell entities in multiple jurisdictions, with investigators citing large volumes of funds processed in recent years. The Treasury account on X posted a public notice underscoring the department’s readiness to deploy the full range of available authorities. (apnews.com)
Reports accompanying the letters allege that Iran moved significant sums through networks tied to front companies in Hong Kong and the UAE, a development that prompted Treasury officials to single out specific regional hubs for scrutiny. The agency’s public statement framed the action as aimed at stopping funding for activities Washington deems destabilizing. (apnews.com)
Secondary Sanctions Threatened Under ‘Economic Fury’
Treasury Secretary Scott Bessent has publicly warned companies and foreign governments that facilitating payments to Iran — including fees tied to transit through the Strait of Hormuz — could expose them to punitive measures. His remarks have been linked by analysts to an intensifying U.S. enforcement posture dubbed in some briefings as part of “Operation Epic Fury.” (arabnews.com)
Administration officials say the objective is to “disable Iran’s ability to support terrorism, threaten the region and global markets, and continue prohibited nuclear and missile programs,” language echoed in the letters. The warnings are intended to raise the reputational and legal costs for banks that continue handling suspect Iranian-related flows. (apnews.com)
Temporary Oil Waiver Set to Expire on April 19
In parallel with the banking notices, the Treasury has announced it will allow a short-term waiver that had permitted sales of Iranian oil already loaded at sea to lapse on April 19, 2026, a move expected to tighten economic pressure on Tehran. The department said the temporary authorization would not be renewed. (aa.com.tr)
The waiver had been introduced earlier this year to ease supply disruptions and blunt oil price spikes while U.S. forces maintained restrictions on vessels linked to Iran in the Strait of Hormuz. Its expiration signals a shift toward a firmer sanctions posture amid ongoing regional tensions. (business-standard.com)
Potential Impact on Gulf Financial Hubs and Trade
Banks in the Gulf that maintain large correspondent relationships with global partners face heightened compliance costs as they reassess exposure to Iranian-linked flows and the risk of secondary penalties. Local institutions will need to strengthen due-diligence systems and may limit or close high-risk correspondent lines to avoid downstream consequences. (apnews.com)
Traders and shipping firms that relied on the recent waiver to move or sell Iranian barrels may also face market uncertainty as the authorization ends, with implications for freight bookings, insurance coverage and pricing in regional energy markets. Authorities in transit states and financial centers are likely to engage with U.S. regulators in coming days to clarify enforcement expectations. (aa.com.tr)
The Treasury action and the waiver’s expiry mark a notable escalation in the U.S. campaign to isolate Iran economically, placing banks and commercial actors across multiple jurisdictions on notice that facilitation of suspect Iranian transactions will carry concrete costs.