Hot reading
This technique is used by some television psychics in conjunction with cold reading. The psychics may have clients schedule their appearance ahead of time, and then collect information using collaborators who pose as religious missionaries, magazine sales people, or similar roles. Such visitors can gain a wide understanding of a person from examining their home, where tickets for the show may have been sent in advance. The "psychic" may then be briefed on the information, and told where the person will sit in the audience.
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