Kernrechtsfrage
Whether the appeal filed by fax was admissible and properly substantiated.
Extrahierter Entscheid
The appeal was inadmissible because federal appeals must be filed in the legally prescribed form; a fax filing is not sufficient and no signed postal filing followed. It would also have failed for lack of an appeal-specific reasoning.
Extrahierte Begründung
Art. 48 Abs. 1 BGG and Art. 42 Abs. 4 BGG require filing by hand delivery/post or electronically with recognized electronic signature. The appellant did not cure the defect after the presidency letter, so non-entry was required under Art. 108 Abs. 1 lit. a BGG.