A privacy breach by Child Youth and Family has resulted in the department taking legal action , claiming a woman was trying to blackmail them after it accidentally sent her somebody else 's private information . In a statement , CYF head Bernadine Mackenzie said the department had mistakenly sent a Family Court document to another person , who was refusing to return or destroy it . " She is demanding that we return one of her children to her care in exchange for the document , " Ms Mackenzie alleged . ;