There is a popular Catholic website with "deliverance" prayers posted on one of the links. Having spoken with three exorcists, I want to warn readers about several things.
One, only a priest exorcist can get rid of possessions. One should get an exorcist's advice about obsessions and oppressions.
Two, lay people should not be praying over each other for so-called deliverance unless they are on a team with an appointed diocesan priest exorcist.
Three, one can pray for one's own family, but should not be praying for others unless one gets advice from an appointed exorcist, if there is indications of demonic influence. The Auxilium prayers include prayers for friends.
If one want to pray for the family members or family tree issues, become a member of the Auxilium Christianorum, but only after asking your spiritual director if this is OK.
Four, Protestants do not have authority to exoricize. Exorcist-priests know this.
Five, the long prayer of St. Michael from Pope Leo XIII is not to be said by the laity publicly or privately. This is a prayer for priest exorcists. Some priests are warning Catholics about this long prayer.
Six, the demons recognize real authority and beat up fake authority.
Seven, exorcists live a life of intense prayer and fasting. This is not the call of the ordinary lay person, unless they have been asked to work with a priest exorcist.
Eight, do not say the prayers you find online except for the ones on the Auxilium Christianorum site after you join the group. The group protects you and is under appointed exorcist priests, as it is under ecclesiastical authority.
Nine, avoid charismatic healing Masses which operate outside the authority of the Bishop or which involve Protestant ministry. Too many actually do more harm than good. Most are actually spiritually dangerous.
Ten, never, never let anyone pray over you, unless that person is one or both of your parents, an appointed priest in the diocese, or one with permission from another bishop if the priest is visiting. Parents have authority to pray over their children. And, as Father Chad Ripperger notes in several of his talks, demons respect real authority and are legalistic. They will laugh at false authority.
http://www.auxiliumchristianorum.org/