U.S. Treasury Designates Mahmoud al-Abyari: What the Hamas Sanctions Mean for European Businesses and Banks

A new U.S. sanctions action shines another spotlight on a problem European companies can’t afford to ignore: the financial and reputational risks hidden inside cross-border business relationships. On July 23, 2026, the U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC) designated Mahmoud al-Abyari, identified by Treasury as a senior United Kingdom-based leader of the Egyptian Muslim Brotherhood (EMB). The action came against three entities and three individuals that the Treasury said provided material support to Hamas. For European companies, this development is more than a geopolitical headline. This is another reminder that sanctions screening, know-your-customer (KYC) and beneficial-ownership reviews are now essential components of international business.

Why the U.S. Treasury designation matters

Al-Abyari has served in senior leadership positions within the Muslim Brotherhood General Secretariat and has been designated by the Treasury as the secretary general of the organization. The Treasury also said he backed fundraising for institutions previously designated for ties to Hamas. The wider action on July 23 targeted what the Treasury called a complex web of charities, businesses and illicit financial channels. Among the designated entities were Tujah Bulah Global of Indonesia and Madad Palestine Charitable Society of Gaza, which Treasury said was used to raise funds for Hamas’s military wing. That structure is important to businesses because financial exposure doesn’t always come from a direct transaction with a sanctioned person.

European businesses face indirect sanctions risks

A European company may be working with a supplier, distributor, consultant, charity or financial intermediary and not know right away who is ultimately in control or reaping the benefits of that relationship. This is why sanctions compliance and enhanced due diligence are more critical than ever. Companies need to understand not just their direct customers, but also ownership structures, controlling interests and important third party relationships. The European Banking Authority has already emphasized the importance of internal controls, governance, risk management, KYC, screening and due diligence in the implementation of restrictive measures. For businesses, this means a sanctions check should not end with a simple name search.

Banks and financial institutions face greater scrutiny

Financial institutions are especially vulnerable because international payments can pass thru several jurisdictions and intermediaries en route to their destination. The Treasury’s most recent move explicitly mentioned underground banking, including fiat-to-crypto and crypto-to-crypto services. It warned that foreign financial institutions could be exposed to U.S. secondary sanctions in some circumstances. European banks are therefore highly incentivized to maintain accurate information on customers, monitor transactions and investigate suspicious ownership or payment practices. The EBA also has warned that weaknesses in sanctions controls can expose legal and reputational risks and undermine the effectiveness of restrictive-measures regimes.

Supply chains and beneficial ownership are key

The implications reach beyond the banks. Multinational corporations should investigate their suppliers, agents, distributors and other third parties where the ownership may be difficult to determine. Beneficial ownership is very important. A company that looks independent on paper may have ownership or control layers that tie it to a sanctioned person or entity. Under EU anti-money laundering rules, most business relationships and transactions cannot be created or performed until the customer and the beneficial owner have been verified.

Reputation can become a financial risk

Sanctions exposure can be more than a compliance department issue. Increasingly, companies are being pressured by investors, customers and business partners to demonstrate good governance and responsible risk management. Even indirect links to a sanctioned network can lead to expensive investigations, lost partnerships, banking problems and reputational damage. So the latest Treasury move should be viewed by European companies as a warning to tighten existing controls rather than wait for a compliance problem to develop.

FAQs

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Find out how the latest U.S. Treasury action could affect European businesses and banks.

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See how new sanctions could increase scrutiny of banks and cross-border payments.