Question juridique clé
Whether the transmission of the requested bank documents violated proportionality in mutual assistance
Solution extraite
No. The request was broad enough to justify transmission of the opening documents and account statements, and the authority did not exceed the foreign request.
Motifs extraits
The Court held that mutual assistance may be refused only when the requested acts are manifestly unrelated to the offense or amount to a fishing expedition. Here the Italian request sought full banking documentation to trace suspect funds, and the Swiss authority remained within the scope of that request while limiting disclosure for the other accounts.