Following its investigations, on 26 January 2015, the TNA issued a decision in which the Italian skater was sanction with a 16-month period of ineligibility for her alleged involvement in a doping case involving Italian former race walker and Olympic champion Alex Schwazer.
Ms. Kostner herself was appealed the decision, principally seeking its annulment and a declaration that she did not commit any breach of the anti-doping rules. The second appeal was filed by the Italian National Olympic Committee (CONI) whose Anti-Doping Prosecution Office seeks to increase the ineligibility to two years.