FINMA Updates Sudan Sanctions in SESAM: What Swiss Financial Intermediaries Must Do Now

Switzerland's Federal Department of Economic Affairs, Education and Research (WBF/EAER) amended Annex 2 of the Sudan sanctions ordinance on 4 June 2026, and FINMA followed immediately by updating the SECO Sanctions Management database, known as SESAM. The changes took effect the same day at 23:00. For Swiss financial intermediaries handling any customer relationship or transaction with a Sudan-linked nexus, this is an operative compliance event requiring action today, not a policy paper to file away.

What Changed and Why It Matters

The Regulatory Instrument

The legal basis is the Ordinance of 25 May 2005 on Measures against Sudan (SR 946.231.18). Annex 2 of that ordinance lists the persons and entities subject to Swiss autonomous sanctions. The WBF/EAER has the authority to amend that annex, and the 4 June 2026 revision represents exactly that kind of targeted list change. FINMA's role is to notify the financial sector and update SESAM accordingly, which it did on an urgent basis on 5 June 2026.

SESAM as the Operative Reference

SESAM is the authoritative sanctions screening reference for Swiss financial intermediaries. When SECO updates SESAM, institutions are expected to re-screen their client books against the revised list without delay. Unlike some jurisdictions where a brief grace period applies, Swiss practice treats the effective time stated in the official notice (23:00 on the publication date) as the binding moment. Any match discovered after that point triggers the obligations described below.

Obligations for Financial Intermediaries

Asset Freezing

The ordinance requires financial intermediaries to prohibit transactions with newly listed persons or entities and to freeze any assets they hold or control on behalf of those parties. This applies to bank accounts, custody positions, and digital asset holdings. Firms using crypto bookkeeping software or any digital asset accounting software should verify that their systems can flag wallet addresses or counterparty identifiers associated with sanctioned names, not just traditional account numbers. A ledger entry does not change its legal status because it sits on a blockchain rather than a core banking platform.

Reporting to SECO

Once a match is identified and assets are frozen, the intermediary must report the affected business relationship to SECO. The FINMA notice is explicit that filing this SECO report does not discharge any further duties under the Anti-Money Laundering Act (AMLA). If the institution identifies or cannot rule out suspicion of money laundering or terrorist financing within that same relationship, it must also conduct additional clarifications under Article 6 AMLA and, if suspicion persists, file a separate suspicious activity report with the Money Laundering Reporting Office Switzerland (MROS) under Article 9 AMLA.

The Two-Track Reporting Structure

This dual-track structure is a recurring feature of Swiss sanctions practice and deserves attention because it catches firms out. The SECO sanctions report and the MROS suspicious activity report are separate legal instruments with separate recipients and separate triggering conditions. Submitting one does not substitute for the other. Compliance teams should have documented procedures that treat them as parallel workflows, not sequential ones.

Practical Steps for Compliance Teams

Immediate Screening Review

Run a fresh screening of the full client and counterparty database against the updated SESAM list. Pay particular attention to beneficial ownership layers, where a sanctioned individual may appear two or three levels removed from the direct account holder. Swiss AML rules require intermediaries to look through structures to identify controlling persons, and that obligation does not weaken because the listed name was added only yesterday.

Digital Asset Considerations

For firms operating in the digital asset space, on-chain exposure adds a layer of complexity that traditional sanctions workflows were not built to handle. A sanctioned counterparty may have interacted with a wallet address that has since transacted with one of your clients. While Swiss law does not yet impose strict liability for indirect blockchain contact in the way some interpretations of OFAC rules do, the prudent approach is to understand your exposure. Our earlier coverage of how OFAC SDN cryptocurrency addresses affect compliance workflows outlines a framework that translates directly to Swiss intermediary obligations, even if the legal source differs.

Documentation and Audit Trail

Whether or not a match is found, document the screening run: the date and time it was performed, the version of SESAM consulted, the scope of the population screened, and the outcome. Regulators assessing compliance after the fact will want to see evidence that the institution responded to the list update promptly. A crypto accounting software environment that integrates sanctions screening outputs with client ledger data creates a single audit-ready record, which matters when FINMA or SECO asks for documentation.

Connection to Broader Swiss Sanctions Activity

This Sudan update follows a pattern of frequent SESAM revisions that Swiss intermediaries have seen across multiple sanctions regimes in 2026. For context on how FINMA handles similar list changes in other geographies, see our note on FINMA's earlier Hamas and PIJ sanctions update, which explains the same dual SECO/MROS reporting structure in a different country context.

The Sudan ordinance itself has been in force since 2005, but list updates can occur at any time when the WBF/EAER determines that the annex requires revision, typically in response to changes in the UN Security Council consolidated list or autonomous Swiss foreign policy decisions. Firms should treat each FINMA sanctions notice as an operational trigger, not background reading.

Key Obligations at a Glance

The table below summarises the primary duties arising from the updated ordinance, the responsible body to notify, and the relevant legal basis.

What Accounting Firms and CFOs Should Flag

Client Exposure Assessments

Accounting firms advising Swiss-regulated clients should request confirmation from those clients that their compliance teams have screened against the updated SESAM list. Where the firm itself provides outsourced compliance or AML support, the update may trigger direct obligations on the firm depending on the scope of its mandate.

Digital Asset Accounting Software Integration

CFOs and finance teams at entities that hold or transact in digital assets need assurance that their digital asset accounting software can ingest updated sanctions lists and flag affected positions in a timely way. A manual process that relies on a team member checking the FINMA website periodically is not adequate for a regime where the effective time is 23:00 on the date of publication. Automation is not a luxury here; it is a control requirement. Our crypto compliance reporting overview covers how integrated workflows can bridge the gap between sanctions database updates and ledger-level action.

Source: FINMA