Questione giuridica chiave
Whether the appeal should be treated as withdrawn/non-existent for persons whose mandates were not proven.
Decisione estratta
The appeal is treated as non-existent insofar as it was filed for persons whose powers of attorney were not established.
Motivazione estratta
Counsel substantiated their authority only for A.a. and forty-eight consorts; for the others, signed mandates were missing and the appeal could not proceed in their name.