Questione giuridica chiave
Whether the late payment of the third installment justified restoration of the deadline and reopening of the cantonal appeal proceedings.
Decisione estratta
No restoration was justified because an excusable reason or unavoidable impediment was not proven.
Motivazione estratta
The medical certificate conflicted with the fact that the appellant had paid the first two installments during the same alleged period of incapacity, making the claimed inability to pay the third installment implausible.