World February 26, 2026

U.S. Treasury Seeks to Cut Swiss Bank MBaer from U.S. Financial System Over Alleged Ties to Iran and Russia

Proposed rule targets MBaer Merchant Bank AG for allegedly facilitating Russian money-laundering and financing for Iran's IRGC and Quds Force

By Sofia Navarro
U.S. Treasury Seeks to Cut Swiss Bank MBaer from U.S. Financial System Over Alleged Ties to Iran and Russia

The U.S. Treasury Department proposed a rule that would, if finalized, block MBaer Merchant Bank AG, a Swiss bank, from accessing the U.S. financial system. Treasury officials say the bank and certain employees facilitated corruption tied to Russian money laundering and handled transactions linked to Iran's Islamic Revolutionary Guard Corps and its Quds Force. The Treasury said MBaer moved more than $100 million through the U.S. system on behalf of illicit actors tied to Iran and Russia, and warned banks that it will use the full scope of its authorities to protect the integrity of U.S. financial channels.

Key Points

  • The U.S. Treasury proposed a rule to block MBaer Merchant Bank AG, a Swiss bank, from accessing the U.S. financial system if the rule is finalized - sectors impacted include international banking and cross-border payments.
  • Treasury alleges MBaer and some employees facilitated corruption tied to Russian money laundering and engaged in money laundering and terrorist financing on behalf of Iran's Islamic Revolutionary Guard Corps and its Quds Force - sectors impacted include correspondent banking and compliance services.
  • Treasury Secretary Scott Bessent stated that MBaer moved more than $100 million through U.S. financial channels on behalf of illicit actors and warned that the Treasury will use its full authorities to protect the U.S. financial system - this underscores enforcement pressure on financial institutions operating across jurisdictions.

WASHINGTON, Feb 26 - The U.S. Treasury Department on Thursday unveiled a proposed rule aimed at cutting MBaer Merchant Bank AG off from the U.S. financial system, alleging the Swiss bank provided services to illicit actors connected to Iran and Russia.

The Treasury said in its proposal that MBaer and certain employees of the bank had roles in facilitating corruption associated with Russian money laundering. In addition, the agency alleged the bank had been involved in money laundering and in transactions that constituted terrorist financing on behalf of Iran's Islamic Revolutionary Guard Corps and its Quds Force, both of which are subject to U.S. sanctions.

In announcing the proposal, Treasury Secretary Scott Bessent said, "MBaer has funneled over a hundred million dollars through the U.S. financial system on behalf of illicit actors tied to Iran and Russia." He added, "Banks should be on notice that the U.S. Treasury will aggressively protect the integrity of the U.S. financial system using the full force of our authorities."

The rule, as proposed, would sever MBaer Merchant Bank AG's ability to access U.S. financial channels should it be finalized. The Treasury linked the proposed action directly to the bank's alleged role in supporting the movement of funds for actors the United States designates as illicit or sanctioned.

Officials framed the measure as part of an effort to safeguard the U.S. financial system from misuse by actors engaged in corruption, money laundering, or terrorist financing. The proposal identifies specific concerns about MBaer's conduct as the basis for the potential restriction on its access to U.S. financial services.

The notice issued on Thursday lays out the Treasury's allegation that over a hundred million dollars associated with illicit actors tied to Iran and Russia moved through U.S. financial infrastructure by way of MBaer. The Treasury's statement underscored that the department views enforcement as a tool to maintain the integrity of U.S. financial channels.


Note on scope: The information presented here reflects the content of the Treasury's proposed rule and the statements attributed to Treasury officials. It does not add facts beyond those contained in those public statements.

Risks

  • If the proposed rule is finalized, MBaer could lose access to the U.S. financial system, affecting its ability to process transactions that touch U.S. financial channels - this risk affects cross-border banking and payments.
  • Allegations that MBaer facilitated money laundering and terrorist financing for sanctioned entities expose the bank to enforcement actions and potential reputational harm - this risk impacts the broader banking sector's compliance and correspondent relationships.
  • The Treasury's statement that it will "aggressively protect the integrity of the U.S. financial system using the full force of our authorities" signals heightened enforcement risk for other institutions involved in similar activity or with related exposure - this affects compliance, legal, and risk management functions within financial institutions.

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