Questione giuridica chiave
Whether the appeal against the 16 December 2010 AI decision had become moot after the administration's reconsideration.
Decisione estratta
The respondent validly reconsidered and annulled its earlier decision within the response period; the appeal therefore became moot and had to be struck out.
Motivazione estratta
Under Art. 53(3) LPGA, an insurer may reconsider a contested decision until it submits its response. That occurred here, and the original decision was annulled.