Questione giuridica chiave
Whether the defendants' appeal could be heard despite their evidentiary objections being limited by the prior remittal decision
Decisione estratta
The appeal was admissible only within the limits set by the earlier remittal; the cantonal court had to address only the alleged forgery of the 28 August 1997 letter and the authors' capacity.
Motivazione estratta
The prior Federal Supreme Court decision bound the lower court on all issues already decided; only the remaining factual questions were open.