Questione giuridica chiave
Whether the federal appeal was filed on time
Decisione estratta
The appeal was timely because the effective service date was 2011-03-18, not the earlier unsuccessful delivery attempt.
Motivazione estratta
The first postal attempt did not clearly show that it had failed to reach the addressee; the recipient could not know that the letter received on 2011-03-18 was a second delivery attempt, so the time limit started only then, after which the filing was within time considering the statutory suspension period.