Questão jurídica principal
Whether the transmission of the full bank documentation on the appellant's account was proportionate under mutual legal assistance rules.
Decisão extraída
The transmission was proportionate because the request sought to trace the destination of misappropriated funds, and the appellant's account could plausibly contain relevant incoming and outgoing transfers.
Fundamentação extraída
The Court applied a limited prima facie review of utility: in mutual assistance, Swiss authorities may interpret the request broadly and need only exclude documents manifestly useless. Since the request aimed to identify the path of diverted public funds and the appellant's account was linked through transfers from a company mentioned in the request, the full documentation could reasonably be useful.