The U.S. Treasury Department is intensifying its economic pressure campaign on Iran by targeting foreign financial institutions and currency exchange networks that route billions of dollars through American correspondent accounts, despite sweeping international sanctions designed to isolate Tehran from the global financial system.
As the Trump administration pursues its maximum-pressure strategy, officials face a persistent weak link in the global financial architecture: America’s own banking network. Western officials and researchers report that billions of dollars in Iranian funds flow through clearing accounts at U.S. banks annually. Iran achieves this indirect access through foreign institutions that maintain active correspondent-banking relationships with American lenders.
The Mechanics of Shadow Banking and Correspondent Accounts
The century-old correspondent banking system connects financial institutions worldwide, but it also creates vulnerabilities that front companies and currency exchanges exploit. These intermediaries disguise Iranian connections before dollar transactions ever reach U.S. banks for settlement.
The scale of these hidden transactions is substantial. The U.S. Treasury identified approximately $9 billion in Iranian funds that passed through American banks in 2024. To evade detection, Iran relies on shell companies and exchange houses operating in jurisdictions such as Hong Kong and Dubai. These networks convert illicit oil revenues—frequently paid in Chinese yuan—into U.S. dollars, euros, and other usable currencies.
Operation Economic Outcast and Recent Treasury Enforcement
The Trump administration’s broader financial pressure campaign, designated as Operation Economic Outcast, targets Iranian revenue streams, oil transactions, and sanctions-evasion channels. Treasury Secretary Scott Bessent emphasized the administration’s aggressive posture during recent regulatory actions.
As part of this ongoing enforcement, the Treasury Department took direct aim at regional financial institutions facilitating these transfers. On August 28, the department moved to restrict the United Arab Emirates branch of Egypt’s state-owned Banque Misr from accessing U.S. correspondent accounts. U.S. officials stated that the branch processed approximately $1.8 billion for 103 companies potentially connected to Iranian shadow-banking networks between January 2024 and June 2026.
Banque Misr maintained dollar correspondent accounts with three American banks, though the Treasury did not identify them. Public filings on Banque Misr’s website list JPMorgan Chase and Citigroup among its correspondent institutions. Both U.S. banks declined to comment on the Treasury action. Egypt’s Foreign Ministry noted it was in contact with U.S. authorities regarding the allegations, while Banque Misr stated it was engaging with the Treasury Department and complies with applicable regulatory and legal frameworks
while its UAE branches operate normally.
Sanctions on Turkish Institutions and Currency Exchanges
Regulatory pressure extends beyond the Middle East. The Treasury’s Office of Foreign Assets Control sanctioned Türkiye-based Golden Global Bank and two Istanbul-based subsidiaries—Golden Global Varlik Kiralama Anonim Sirketi and Golden Global Portfoy Yonetimi Anonim Sirketi—accusing them of facilitating tens of millions of dollars in transactions for Iran’s Islamic Revolutionary Guard Corps-Quds Force (IRGC-QF).
According to the Treasury Department, Golden Global provided Iran with access to international correspondent banking channels and helped transfer oil revenues from China to Türkiye for conversion into cash and gold. The bank was also accused of processing transactions through accounts controlled by the IRGC-QF and affiliated networks, including Turkish businessman Sitki Ayan and his companies. Ayan was previously designated by the U.S. in 2022 over allegations that his network facilitated hundreds of millions of dollars in oil sales for the Iranian force.
Additionally, the U.S. Treasury imposed sweeping sanctions on three major Iranian currency exchange houses—Opal Exchange, Radin Exchange, and Arz Iran Exchange, also known as the Tahayyori Guarantee Society—along with more than a dozen front companies and key operators including Pedram Pirouzan, Hossein Mohammad Rezaei, Masoud Mohammad Rezaei, Nasser Ghasemi Rad, and Ehsan Tahayyori. Iran’s Foreign Ministry condemned the expanded sanctions campaign, characterizing the measures as state terrorism
and urging other nations not to enforce them.
Enforcement Dilemmas and Global Financial Ripple Effects
The aggressive restrictions present Washington with a complex enforcement dilemma. While increased scrutiny makes it harder for Tehran to move money, overly aggressive limitations on correspondent banking risk disrupting legitimate international payments and driving foreign partners toward alternatives to the U.S. dollar.
Iran has increasingly turned to China’s yuan and cryptocurrencies to bypass American oversight, yet it still requires U.S. dollars for specific trade and technology purchases. Under the current penalties, any U.S.-based assets belonging to designated entities are frozen, and American citizens and institutions are prohibited from conducting business with them. Foreign financial institutions engaging in significant business with the targets face the immediate threat of being cut off entirely from the American financial system.
