Kernrechtsfrage
Whether W. had standing to challenge transmission of the seized file
Extrahierter Entscheid
No standing: only the account holder or person directly subjected to the coercive measure may appeal; W. was only indirectly affected.
Extrahierte Begründung
Swiss mutual assistance standing is limited to persons directly affected by a seizure or similar measure. Indirectly affected persons cannot contest seizure of documents held by a third party.