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
The expression minor exorcism can be used in a technical sense or a general sense. The general sense indicates any exorcism which is not a solemn exorcism of a person believed to be possessed, including various forms of deliverance ministry. This article deals only with the technical sense which specifically refers to certain prayers used with persons preparing to become baptised members of the Christian Church. These prayers request God's assistance so that the person to be baptised will be kept safe from the power of Satan or protected in a more general way from temptation.