Mary Glowrey's Cause was initiated in India by the Bishop of Guntur (Gunter was the place where Mary spent most of her life in India). It continues to be supported by the Congregation of Jesus Mary Joseph, the religious society to which Mary belonged, while her Cause is being considered by the Dicastery for the Causes of Saints. 

Mary Glowrey was accorded the title Servant of God in 2013, which is the title given to a person whose cause for beatification and canonisation in the Catholic Church has been initiated. She was just the second Australian born person to be granted this title. Following the opening of her Cause, investigations into her life and virtues, and her reputation for holiness, were undertaken in the dioceses in which she lived in India and Australia.

The results of the investigations were summarised in a document known as a Positio super virtutibus ('position on the virtues' or positio), an historical account of Mary Glowrey's life and her virtues. The positio has been submitted to the Dicastery for the Causes of Saints at the Vatican which is currently considering Mary Glowrey's Cause.

In Australia the work of studying and promoting Mary Glowrey’s life and legacy is undertaken by the Mary Glowrey Museum and her Cause is supported by the Catholic Women's League of Victoria and Wagga Wagga. 

After a Cause for Canonisation opens, a candidate is granted the title Servant of God.

Investigations are documented and a positio is prepared. The positio is submitted to the Dicastery for the Causes of Saints at the Vatican. If the Dicastery, after examination, finds that the heroic virtues of the Servant of God are established, the Pope may issue a decree confirming that she practiced the virtues to a heroic decree. The Servant of God may then be titled Venerable.

Any miracles (usually a healing considered scientifically inexplicable) attributed to prayers for the intercession of the Venerable are then investigated. If a miracle is established, a person may be beatified, and accorded the title Blessed by the Pope. If another miracle is established, the Blessed may be canonised as a Saint by the Pope.