Kernrechtsfrage
Whether the insurer could refuse to enter into the objection because the insured breached his duty to cooperate by not producing documents about his daughter's work and income.
Extrahierter Entscheid
The refusal to enter was unlawful; the insurer should have decided the benefits dispute on the merits using the available file, possibly including a hypothetical income assessment.
Extrahierte Begründung
Under Art. 43 ATSG, cooperation can be required for fact-finding, but non-cooperation justifies non-entry only exceptionally when a merits decision is impossible on the existing file. Here the insurer still had to assess the claim based on the available evidence.