U.S. Announces New Measures Targeting Iran’s Financial Network

U.S. Sanctions Turkish Bank Accused of Helping Iran Move Oil Revenue Through Global Financial System

The Trump administration has expanded its financial pressure campaign against Iran by sanctioning a Turkish investment bank that U.S. officials accuse of helping Tehran move oil revenue through the international financial system.

The U.S. Treasury Department announced the action on Friday, September 4, targeting Golden Global Yatirim Bankasi, based in Istanbul, along with two affiliated entities. Treasury alleged that the bank facilitated transactions worth tens of millions of dollars for Iran’s Islamic Revolutionary Guard Corps-Quds Force and provided Iranian institutions with access to international banking channels.

The move is part of Treasury Secretary Scott Bessent’s broader Operation Economic Outcast, a campaign launched in August that seeks to disrupt the financial networks Washington says allow Iran to generate revenue, evade sanctions and transfer money through third countries.

Why the Turkish Bank Was Targeted

According to the Treasury Department, Golden Global Bank was involved in a financial network that helped move Iranian oil proceeds from China into Turkey.

U.S. officials allege that Iran’s so-called rahbar shadow-banking network uses front companies and financial intermediaries to move money generated by oil sales. Treasury said Golden Global provided correspondent banking services that allowed transactions connected to accounts controlled by the IRGC-Quds Force and related entities.

The department also alleged that Iranian oil revenue could be transferred from China to Turkey, where money exchangers could convert the proceeds into cash and gold.

Treasury described the bank as an important link in a wider financial network rather than suggesting that the institution itself represented the entirety of Iran’s overseas banking infrastructure.

Golden Global Rejects the Allegations

Golden Global Bank has disputed the U.S. government’s allegations.

The bank said it had complied with Turkish and international banking and compliance requirements and denied having direct or indirect dealings with the individuals and organizations identified in the U.S. sanctions decision.

The institution said it intended to pursue legal remedies against what it characterized as unfounded allegations.

That response is significant because the Treasury allegations are the basis for the U.S. sanctions designation, while the bank maintains that its own records do not support Washington’s claims.

What the Sanctions Mean

Golden Global Bank and its two subsidiaries were placed on the U.S. Office of Foreign Assets Control’s Specially Designated Nationals list.

That designation generally blocks property and interests in property within U.S. jurisdiction and prohibits U.S. persons from engaging in transactions involving the designated entities, subject to applicable exceptions and licenses.

Treasury also issued a general license allowing certain transactions necessary to wind down dealings with the sanctioned institutions.

For a foreign bank, the practical significance extends beyond whether it has substantial business inside the United States. Access to the dollar-based financial system and relationships with international banks can be crucial to conducting cross-border transactions.

That is why Washington has increasingly used sanctions and secondary-sanctions pressure against foreign financial institutions accused of helping Iran.

Part of a Broader U.S. Campaign

The Golden Global action did not occur in isolation.

On August 24, Treasury launched Operation Economic Outcast, describing it as a broad effort to identify and disrupt financial channels used by Iran and its international facilitators. The campaign focuses on networks connected to oil revenue, sanctions evasion and other sources of funding for the Iranian government and IRGC.

Treasury subsequently moved against financial institutions and networks in other countries.

On August 28, for example, the department’s Financial Crimes Enforcement Network proposed cutting the UAE operations of Egypt’s Banque Misr off from correspondent banking access to U.S. financial institutions. Treasury alleged that the UAE operation had processed transactions involving companies potentially connected to Iranian shadow-banking networks.

Treasury has also continued imposing sanctions on networks accused of helping Iran move foreign currency and support its military and proxy organizations.

The strategy therefore represents a shift toward targeting not only Iranian banks and companies, but also the foreign intermediaries that Washington says allow Iranian money to reach the international economy.

Why Turkey Matters

The action is particularly notable because Turkey is a member of NATO and maintains extensive economic ties with Iran.

U.S. Ambassador to Turkey Tom Barrack sought to distinguish the action against Golden Global from the broader Turkish financial system, saying the measure concerned the conduct of one institution rather than the health of Turkey’s banking sector.

The sanctions also come against the backdrop of an earlier U.S. legal case involving Halkbank, a major Turkish state-owned lender. U.S. prosecutors had accused Halkbank of helping Iran evade American sanctions, making the relationship between Washington and Turkish financial institutions a longstanding point of tension.

The Golden Global designation, however, is part of the Trump administration’s newer sanctions campaign and represents a direct attempt to pressure foreign banks over their dealings with Iranian financial networks.

Washington Signals More Sanctions Could Follow

The Treasury Department has indicated that Golden Global may not be the last foreign financial institution targeted.

Bessent has said the administration intends to continue pursuing banks and other intermediaries that Washington believes are helping Iran maintain access to international finance. Reporting on the Golden Global action said the Treasury secretary expected additional sanctions announcements as the campaign continued.

That could put additional pressure on banks in countries that maintain commercial relationships with Iran.

For financial institutions, the concern is not limited to direct U.S. transactions. Losing access to American financial institutions or creating sanctions exposure for international partners can make it substantially harder to conduct cross-border business.

Iran’s Oil Revenue Is at the Center of the Strategy

The focus on oil money reflects the central role petroleum revenue has historically played in Iran’s economy.

Washington has sought to restrict Iran’s ability to sell oil and, just as importantly, to prevent Tehran from freely converting those proceeds into usable foreign currency.

Iran has developed increasingly complex networks involving exchange houses, front companies, shipping intermediaries and foreign financial institutions to keep money moving despite sanctions. Treasury has said its investigators have been mapping those networks and identifying the institutions that help facilitate transactions.

The latest action against Golden Global is therefore aimed at a specific part of a much larger financial system.

What Happens Next

The immediate effect of the sanctions will be felt by Golden Global Bank and its affiliated entities as they navigate restrictions on their dealings with the United States and U.S.-linked financial institutions.

The broader question is whether Washington can persuade other international banks to distance themselves from Iranian transactions out of concern that they could face similar penalties.

Treasury’s campaign suggests that the administration intends to make that risk increasingly clear to foreign financial institutions.

At the same time, the allegations against Golden Global remain contested by the bank, which says it complied with applicable banking rules and denies the conduct described in the U.S. sanctions decision.

For now, the sanctions mark another step in Washington’s effort to restrict Iran’s ability to turn oil revenue into accessible funds—and demonstrate that the campaign is increasingly reaching financial institutions outside Iran itself.