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.
Mark 1
There were several people who were claimed to have the ability to perform exorcisms in the ancient world and many ancient opponents of Christianity dismissed Jesus as just another magician. Most descriptions of exorcisms at the time tended to involve the exorcist tricking the spirit or demon into leaving the victim by convincing them the exorcist had more power than the being, not a method Jesus employs. Parallels in Hellenistic cultural stories of exorcisms differ in that they usually involve an associated disease, which is not the case here. John P. Meier sees a clear distinction between these incidents and descriptions of magicians at the time.