Questione giuridica chiave
Whether the tax authority could directly demand third-party attestations and identities under the direct federal tax rules without first summoning the taxpayers.
Decisione estratta
No. Direct recourse to the third party was unavailable because the taxpayers had not first been summoned and failed to comply.
Motivazione estratta
Art. 127 LIFD makes the duty of the third party subsidiary: the authority must first request the attestation from the taxpayer, then summon the taxpayer, and only thereafter may it address the third party directly. That condition was missing.