Spiritualists and Mediums. I don't know, what I do know is that there is no scientific proof of their ability to contact "The other side". I have seen stage "magicians" doing the same thing and admitting that it was a trick, but this does not prove that the others are tricksters.

Are they genuine? Any proof? Even if they are fakes does it matter if others get a peace of mind from listening to them? Do they cause harm?