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.
Minor exorcism in Christianity
Today, in some provinces of the Anglican Communion, the "Anglican liturgy does not involve an explicit exorcism or rejection of evil, but does including a signing with the cross and the wish that baptism delivers one from "the powers of darkness." Others, such as the Anglican Church of Tanzania, however, provide for anointing and consignation that accompanies "the exorcism that follows the examination of the candidates".