Mother Eugenia Ravasio's messages were approved by Bishop Alexander Caillot of Grenoble, who was mentioned in the messages. Bishop Caillot ordered an investigation, and after ten years issued a letter stating that the messages had a divine nature. In 1988 the messages received the imprimatur of Cardinal Petrus Canisius Van Lierde, Vicar General for the Vatican City State, whose general duties were the administration of daily functions of Vatican City. The imprimatur signified that in the Cardinal's opinion the messages contain nothing against faith and morals, but not certifying that the messages were received from God the Father. The Congregation for the Doctrine of the Faith at the Holy See, which is the official authority for approving private revelations on behalf of the Catholic Church has not approved Mother Ravasio's messages as authentic, nor issued an opinion on them.