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.
Exorcism in Christianity
For example, in one particular situation, a Roman Catholic woman believed that her house was haunted, and therefore consulted her priest for assistance. Since he was not available to drive the demons from the woman's home, she contacted a Methodist pastor, who exorcised the evil spirits from a room, which was believed to be the source of distress in the house, and celebrated Holy Communion in the same place; following these actions, there was no longer any problem in the house. In another situation, The Reverend Jay Bartlett writes that a young lady who was involved with "drug abuse, self mutilation, severe abuse, mental torment, Satanism, occult activity, communion with demons, and other evils" was exorcised at Mt. Olive Free Methodist Church in Dallas over a period of seven nights, with "anointing oil, the Word of God (the sword of the Spirit), holy water, the sacred symbols of the cross, the blood of Christ, and consecrated materials [being] utilized to drive out the demons."