Whether the appeal filed by the appellant's grandmother without signed authorization had to be treated as withdrawn.
Yes. Because the defect was not cured after two formal warnings, the appeal was deemed withdrawn and the case struck from the docket.
Under Arts. 16 and 27 LPA-VD, the authority may require written proof of authority and must set a short cure period for defective filings. The grandmother was duly warned twice and informed that non-compliance would result in the appeal being deemed withdrawn; she did not comply.