Questão jurídica principal
Whether a remedy filed by fax is valid without an original signature and whether a grace period must be granted.
Decisão extraída
A remedy submitted by fax is invalid because the original signature is missing; no time limit for rectification is to be set.
Fundamentação extraída
The court reaffirmed its case law that written-form requirements are not satisfied by fax transmission and that the defect is not curable by later supplementation.