Kernrechtsfrage
Whether the appeal met the formal admissibility requirements of Art. 61 let. b LPGA and was cured after the court's order.
Extrahierter Entscheid
The filing did not contain the required facts, reasons, and conclusions, and the defect was not cured within the set time limit.
Extrahierte Begründung
The letter of 1 April 2012 was manifestly insufficient under Art. 61 let. b LPGA. The appellant was given ten days to complete the appeal and warned of inadmissibility, but he did not comply.