A major advantage of live phone readings versus in-person appointments is that there is no chance that the reader can cheat. During a face-to-face session, a reader can gather many clues and insights about a person based on demeanour, clothing, jewellery, hair, make-up, and overall attitude and appearance. The psychic might draw conclusions about someone based on those clues and form the reading around those things. 

In 1925, Samuel Soal claimed to have taken part in a series of séances with the medium Blanche Cooper who contacted the spirit of a soldier Gordon Davis and revealed the house that he had lived in. Researchers later discovered fraud as the séances had taken place in 1922, not 1925. The magician and paranormal investigator Bob Couttie revealed that Davis was alive, Soal lived close to him and had altered the records of the sittings after checking out the house. Soal's co-workers knew that he had fiddled the results but were kept quiet with threats of libel suits.[142]
Yes, it was! When I used to work [there], I felt the spirits which were from the old days of the begining of the 19th century. Also, at the end of my shifts, the girls that worked with me would always ask me to read their palms. Considering the amount of energy that is required for palm reading, the Clubhouse was the perfect place for me to do it. I felt that the spirits there would appreciate me, considering the fact that I could feel them. I also felt a good energy. The spirits made me feel that I could make good money when I worked there.
In 1880 the American stage mentalist Washington Irving Bishop published a book revealing how mediums would use secret codes as the trick for their clairvoyant readings.[84] The Seybert Commission was a group of faculty at the University of Pennsylvania who in 1884–1887 exposed fraudulent mediums such as Pierre L. O. A. Keeler and Henry Slade.[85] The Fox sisters confessed to fraud in 1888. Margaret Fox revealed that she and her sister had produced the "spirit" rappings by cracking their toe joints.[86]