Key legal question
Whether the appellant could challenge transfer of documents relating to accounts allegedly held by companies rather than by him personally.
Extracted holding
Standing could not be definitively excluded, but the point was not decisive because the same reasoning applied to all accounts.
Extracted reasoning
The cantonal findings on account ownership could not be verified from the transmitted file; in any event, the substantive objections were identical for all accounts, so any error in standing would not affect the outcome.