US sanctions Turkish bank over alleged Iran ties; bank threatens legal action

The United States Treasury Department moved Friday to cut off a Turkish bank from the global financial system, accusing it of serving as a conduit for tens of millions of dollars flowing to Iran's Islamic Revolutionary Guard Corps. Golden Global Bank, along with its two subsidiaries, was placed on the Treasury's Specially Designated Nationals list—a designation that severs access to US financial infrastructure and effectively freezes the institution out of dollar-denominated transactions worldwide.

According to Treasury officials, Golden Global Bank was established specifically to enable what Washington calls Iran's "rahbar network," a shadow banking apparatus designed to move money beyond the reach of international sanctions. The bank allegedly facilitated the transfer of Iranian oil revenues originating from China, moving the funds through Turkey using gold and cash. The scale of the alleged activity—tens of millions of dollars—underscores the Treasury's concern that the institution had become a critical node in Iran's efforts to circumvent economic isolation.

Treasury Secretary Scott Bessent framed the action as part of "Operation Economic Outcast," a campaign to pressure financial institutions into compliance with US sanctions policy. "Financial institutions continue to find out the hard way that we are serious about Operation Economic Outcast," Bessent said in a statement accompanying the announcement. The language suggested this was not an isolated enforcement action but part of a broader, intensifying effort.

Golden Global Bank rejected the allegations entirely. In a statement released Friday, the bank said it had complied with all local and international banking regulations and that no transactions it conducted could substantiate the US claims. The bank further asserted that individuals and entities named in the Treasury's decision had never been customers. Rather than accept the designation, Golden Global announced it would pursue legal remedies, stating it would "exercise all our rights of objection and legal recourse in the most effective manner and will take the necessary actions at the earliest against these allegations and the decision."

The timing of the sanction reflected a deliberate escalation. Bessent had signaled days earlier, while attending a G20 summit, that the Treasury planned to announce bank sanctions this week and another the following week. The pattern suggested a coordinated campaign rather than a reactive enforcement measure. The previous week, the US had already moved to sever the UAE operations of Egypt's second-largest bank from financial access on similar grounds—processing transactions for companies linked to Iran's shadow banking network.

US Ambassador to Turkey Tom Barrack moved quickly to contain potential diplomatic fallout. On Saturday, he posted on social media that it would be a mistake for Turkish officials to interpret the sanction as a judgment on Turkey itself. "The health of the Turkish financial system is not in question; the conduct of one institution was," Barrack said, attempting to draw a distinction between the targeted bank and the broader Turkish financial sector. The clarification suggested awareness that Turkey, a NATO ally, might view the action as a broader indictment of its financial oversight or complicity.

The sanction placed Golden Global Bank in a precarious position. Cut off from the US financial system and facing legal threats from Washington, the bank's ability to conduct international business would be severely constrained. Whether its legal challenge would succeed remained uncertain; such cases typically hinge on classified intelligence that the Treasury does not publicly disclose. The bank's denial and threat of legal action set the stage for a prolonged dispute, even as the Treasury signaled it was preparing to impose similar measures on other institutions in the coming weeks.