The Championship club have co-operated with French authorities as the death of the Argentine continues to be investigated
Cardiff City has submitted several documents to French prosecutors regarding Emiliano Sala to help with the decision on whether Nantes will face criminal proceedings for the death of their former player.
The Argentinian striker died when the plane carrying him to Wales crashed at sea last January as he was preparing to seal a move to Cardiff from the Ligue 1 club.
Sala's body was discovered in waters near the Channel Islands over two weeks after the plane disappeared - while the remains of pilot David Ibbotson have never been found.