Exorcism
In Catholic Christianity, exorcisms are performed in the name of Jesus Christ. A distinction is made between a formal exorcism, which can only be conducted by a priest during a baptism or with the permission of a bishop, and "prayers of deliverance" which can be said by anyone.
The Catholic rite for a formal exorcism, called a "Major Exorcism", is given in Section 11 of the Rituale Romanum. The Ritual lists guidelines for conducting an exorcism, and for determining when a formal exorcism is required. Priests are instructed to carefully determine that the nature of the affliction is not actually a psychological or physical illness before proceeding.
Giancarlo Gramolazzo
He was dedicated during 30 years to exorcism, becoming president of the International Association of Exorcists, founded in 1990 by father Gabriele Amorth (1925–2016), who later remained its honourable president and 5 other priests.
Father Gramolazzo has over thirty years experience as an exorcist.
He helped Father Gabriele Amorth in a 1999 exorcism of a nineteen years old woman. The next day the same woman who appeared at the Vatican underwent another exorcism performed by Pope John Paul II.