Jinn: “Indeed, Satan flees from the house in which Surah Al-Baqarah (the 2nd chapter of the Quran) is recited.” (Al-Tirmidhi)

If a person does become possessed, then the name of God has to be used in expelling the Jinn.  If we look at the practice of the Prophet and his companions, we find many invocations to exorcise the Jinn.  All of them invoke God to help the possessed person.  How contrary this is to many modern-day exorcists.  Many exorcists, often invoke the names of others besides God to exorcise the Jinn.  When the Jinn does leave, these people believe that their way was successful.  However, this is a ploy of the Jinn, as it knows that if it obeys the exorcist, then it has succeeded in making him worship others besides God.  The Jinn often returns when the exorcist leaves, as it knows that nothing except the words of God can stop it from oppressing others.