The apparitions were declared as Non-supernatural after an investigation by six Filipino bishops headed by the former Archbishop of Manila, Cardinal Rufino Santos on 11 April 1951.

On 12 September 2015, the Archbishop of Lipa, Ramon Arguelles, against explicit direction from the Holy See and the Catholic Bishops' Conference of the Philippines, formally declared approval of the apparitions, citing them as "supernatural and worthy of belief".

Ultimately, Archbishop Arguelles retracted his declaration of supernaturality on 1 June 2016, citing to the original decision by the Holy Office as Non-Supernatural.

[6] On 18 August 1948, Castillo, then a postulant at the monastery, noticed a heavenly odour, and upon entering her room saw a beautiful lady in white who spoke to her: "Do not fear my daughter, He who loves above all things has sent me.

[6] The prioress, Mary Cecilia of Jesus, decided to consult with Alfredo Obviar, Auxiliary Bishop of Lipa and spiritual director of the nuns.

According to Teresita Castillo, the Virgin Mary was slightly stooped and dressed in white, with a narrow cloth belt about her waist.

[5] Castillo herself in an interview said she had met the Apostolic Nuncio to the Philippines Cardinal Egidio Vagnozzi in 1951, and told him that she had already left the monastery to seek medical treatment.

[citation needed] On 21 May 1990, then-Lipa Archbishop Mariano G. Gaviola, allowed the veneration of the namesake Marian image after forty years of being banned from the public.

On 12 September 2015, Argüelles formally released the canonical results of the investigation launched by the archdiocese, declaring the Marian apparitions to be Supernatural in character and worthy of pious belief.

In December 2022 Harriet Demetriou, former justice of the anti-graft court Sandiganbayan, filed a perjury complaint against Dominican exorcist priest Father Winston Cabading for claiming under oath that the 1951 decree existed.

[16] Former Philippine Ambassador to the Holy See, Mercedes Arrastia Tuason, is a devotee of the apparitions, and displayed a large statue of Our Lady Mediatrix of All Grace in her consular office in Rome.

[17] Emma de Guzman, purported visionary, stigmatist and foundress of the church-sanctioned "La Pietà" International Prayer Group,[18] said that Mary had declared herself to be "the Mediatrix standing in front of the Mediator".

[19] The Archdiocese of Lipa currently endorses Marian devotion to this title, which is not expressly prohibited as long as it does not counter church doctrine.