Key legal question
Whether the bank's access to the criminal file had to be restricted because of a concrete risk of premature transmission of secret information to Russia.
Extracted holding
Yes. The file access granted by the prosecution had to be annulled and the prosecution instructed to restrict disclosure step by step in line with mutual legal assistance safeguards.
Extracted reasoning
Because the Swiss criminal and Russian proceedings were closely connected, disclosure to the bank created a real risk of informal transmission abroad. Limiting access to the bank's lawyers only was insufficient, since counsel still owed duties of information and advice to the client and could not effectively prevent onward communication.