The séance trick of the Eddy Brothers was revealed by the magician Chung Ling Soo in 1898. The brothers utilized a fake hand made of lead, and with their hands free from control would play musical instruments and move objects in the séance room. The physiologist Ivor Lloyd Tuckett examined a case of spirit photography that W. T. Stead had claimed was genuine. Stead visited a photographer who had produced a photograph of him with deceased soldier known as "Piet Botha". Stead claimed that the photographer could not have come across any information about Piet Botha, however, Tuckett discovered that an article in 1899 had been published on Pietrus Botha in a weekly magazine with a portrait and personal details.
Modern spiritualists and psychics keep detailed files on their victims. As might be expected, these files can be very valuable and are often passed on from one medium or psychic to another when one retires or dies. Even if a psychic doesn't use a private detective or have immediate access to driver's license records and such, there is still a very powerful technique that will allow the psychic to convince people that the psychic knows all about them, their problems, and their deep personal secrets, fears, and desires. The technique is called cold reading and is probably as old as charlatanism itself... If John Edward (or any of the other self-proclaimed speakers with the dead) really could communicate with the dead, it would be a trivial matter to prove it. All that would be necessary would be for him to contact any of the thousands of missing persons who are presumed dead—famous (e.g., Jimmy Hoffa, Judge Crater) or otherwise—and correctly report where the body is. Of course, this is never done. All we get, instead, are platitudes to the effect that Aunt Millie, who liked green plates, is happy on the other side.
In 1992, Richard Wiseman analyzed the Feilding report of Eusapia Palladino and argued that she employed a secret accomplice that could enter the room by a fake door panel positioned near the séance cabinet. Wiseman discovered this trick was already mentioned in a book from 1851, he also visited a carpenter and skilled magician who constructed a door within an hour with a false panel. The accomplice was suspected to be her second husband, who insisted on bringing Palladino to the hotel where the séances took place. Massimo Polidoro and Gian Marco Rinaldi also analyzed the Feilding report but came to the conclusion no secret accomplice was needed as Palladino during the 1908 Naples séances could have produced the phenomena by using her foot.
^ John Casey. (2009). After Lives: A Guide to Heaven, Hell and Purgatory. Oxford. p. 373. ISBN 978-0-19-997503-7 "The poet attended one of Home's seances where a face was materialized, which, Home's spirit guide announced, was that of Browning's dead son. Browning seized the supposed materialized head, and it turned out to be the bare foot of Home. The deception was not helped by the fact that Browning never had lost a son in infancy."
The same week that the Thomas John sting revelation was made in The New York Times, John's claimed mediumship abilities portrayed in the Lifetime reality TV show called Seatbelt Psychic were challenged by Gerbic in an article published by Skeptical Inquirer. In the show, John is a ride-share driver who surprises “unsuspecting” passengers when he delivers messages from their deceased relatives. Gerbic investigated and revealed that John's passengers are actually actors, several of which are documented in IMDb. Gerbic concluded that the riders were likely hired to ride with John, but were probably not acting when talking with him. She concluded that the details about their lives mentioned by John were easily found on social media sources, and likely fed to John, making the readings actually hot readings. One rider, Wendy Westmoreland, played a character on Stalked by a Doctor, a TV show also produced by Lifetime.
In the late 1920s and early 1930s there were around one quarter of a million practising Spiritualists and some two thousand Spiritualist societies in the UK in addition to flourishing microcultures of platform mediumship and 'home circles'. Spiritualism continues to be practised, primarily through various denominational Spiritualist churches in the United States, Canada, Australia and the United Kingdom. In the United Kingdom, over 340 Spiritualist churches and centres open their doors to the public and free demonstrations of mediumship are regularly performed.