The Vatican is reportedly preparing to issue new rules about Marian apparitions:

Catholics who claim they have seen the Virgin Mary will be forced to remain silent about the apparitions until a team of psychologists, theologians, priests and exorcists have fully investigated their claims under new Vatican guidelines aimed at stamping out false claims of miracles.

The Pope has instructed the Congregation for the Doctrine of the Faith, formerly the Holy Office of the Inquisition, to draw up a new handbook to help bishops snuff out an explosion of bogus heavenly apparitions.

Benedict XVI plans to update the Vatican’s current rules on investigating apparitions to help distinguish between true and false claims of visions of Jesus and the Virgin Mary, messages, stigmata (the appearances of the five wounds of Christ), weeping and bleeding statues and Eucharistic miracles.

Monsignor Luis Francisco Ladaria Ferrer, a respected Spanish Jesuit archbishop, has been placed in charge of drawing up the handbook, known as a “vademecum”, which will update the current rules set in 1978.

According to Petrus, an Italian online magazine which leans towards conservative elements in the Vatican, anyone who claims to have seen an apparition will only be believed as long as they remain silent and do not court publicity over their claims. If they refuse to obey, this will be taken as a sign that their claims are false

The London Telegraph has more:

The Pope is said to be deeply concerned by the explosion in the number of pseudo-mystics who, claiming a direct line to God, set themselves against the bishops and lure the Catholic faithful out of the Church and into disobedient cults.

When a claim of heavenly apparitions occurs, the local bishop will need to set up a commission of psychiatrists, psychologists, theologians and priests who will investigate the claims systematically.

The first step will be to impose silence on the alleged visionaries and if they refuse to obey then this will be taken as a sign that their claims are false.

The visionaries will next be visited by psychiatrists, either atheists or Catholics, to certify their mental health and to verify whether they are suffering from conditions of a hysterical or hallucinatory character or from delusions of leadership.

The third step will be to investigate the person’s level of education and to determine if they have had access to material that could be used to falsely support their claims.

The new document will also instruct the bishops to see if the visionaries and their associates stand to gain financially from making their claims.

The content of any heavenly messages will also be scrutinised to see if it is harmony with the teachings of the Church.

UPDATE: John Allen has a very good overview of what the Vatican document says, and puts it in an interesting context.