Adaptation of Contracts under Changed Circumstances in Swiss Law Practice: Contracts, Arbitration and Swiss Federal Court Practice

Published: 10 May 1996

Deals & Cases — 20.06.2025

Lenz & Staehelin successfully represented an estate in setting aside proceedings before the Swiss Federal Supreme Court

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Lenz & Staehelin secures major win for thyssenkrupp in multi-billion submarine arbitration brought by the Greek state

Insights – 23.04.2026

Swiss Federal Supreme Court holds Swiss Russia sanctions are overriding mandatory law and can bar enforcement of arbitral awards

Swiss Federal Supreme Court holds Swiss Russia sanctions are overriding…

<p>In decision 4A_305/2025 of 13 March 2026, the Swiss Federal Supreme Court held that Swiss sanctions against Russia are overriding mandatory law and apply irrespective of the otherwise applicable law. The Court reasoned that the Swiss Ukraine Ordinance serves Switzerland’s core foreign-policy objectives and therefore applies as overriding mandatory law. In this case, the Court held that the sanctions barred enforcement of the award in Switzerland and treated the claim as unenforceable while the sanctions remain in force.</p>

Insights – 22.12.2025

Swiss Court decides to hear landmark climate litigation