B-17-06 FINMA Circ. 17/6

According to Judgment 2C_506/2024 of May 4, 2026 (scheduled for publication), issued by the Second Public Law Division of the Federal Supreme Court, professional secrecy does not preclude Switzerland from providing a foreign state, in the context of administrative assistance proceedings, with documents held by the cantonal tax administration that it received from an attorney acting on behalf of his client. In this case, the Spanish tax authorities suspect a taxpayer domiciled in Switzerland of actually being domiciled in Spain.[...]

The principle of subsidiarity does not require a state to consult the taxpayer prior to requesting international administrative assistance in tax matters, as long as its domestic law does not require it to do so. This was the ruling of the Federal Court on the legal question of principle raised in case 2C_352/2024 (intended for publication). In 2020, the Israeli Tax Information Exchange Service requested the FTA to provide it with various information (identity of account holders, identity of beneficial[...]

In three judgments 1C_435/2024, 1C_604/2024 (intended for publication) and 1C_610/2024 of 19 May 2025, the Federal Supreme Court ruled to uphold the freeze on bank assets ordered by the Federal Council in 2022 and 2023, the beneficial owners of which are persons belonging to the political entourage of former Ukrainian President Viktor Yanukovych. The assets had initially been seized following a request for international mutual assistance in criminal matters addressed to Switzerland by Ukraine (see TPF, RR.2017.118-121, RR.2017.122, 6 February[...]

Bank accounts held by a lawyer may contain information protected by professional secrecy, which must not be disclosed to a foreign state in the context of administrative assistance in tax matters. This must be assumed to be the case for client accounts opened using Form R, but it is also possible that other accounts held by the lawyer may contain protected information. These are the principles laid down by the Federal Court in a ruling 2C_116/2023 of 2 May 2025[...]