Do your homework when choosing a medium either for teaching or for having a reading performed for yourself. You might want to attend a few readings before deciding to go ahead and practice mediumship yourself. How long have they been practicing? Do they come recommended? Do they belong to an online community where they are rated? Did they have any formal training? There are official organisations and colleges that train mediums if you care to research them, you could study at one yourself! Always thoroughly check and ask for recommendations before joining any group, teacher or organisation.
A very large part is played by fraud in spiritualistic practices, both in the physical and psychical, or automatic, phenomena, but especially in the former. The frequency with which mediums have been convicted of fraud has, indeed, induced many people to abandon the study of psychical research, judging the whole bulk of the phenomena to be fraudulently produced.
Today "demonstration of mediumship" is part of the church service at all churches affiliated with the National Spiritualist Association of Churches (NSAC) and the Spiritualists' National Union (SNU). Demonstration links to NSAC's Declaration of Principal #9. "We affirm that the precepts of Prophecy and Healing are Divine attributes proven through Mediumship."
Why? You may well ask. Simple: it’s because I have a life here, and I need to be able to enjoy it without feeling as if I’m constantly on duty. In my workshops, I teach that we’re spiritual beings as well as physical beings, and it’s so important that we honor all of ourselves. It takes a really strong spirit to get my attention when I’m not working, as it needs to literally break through my shield, my “off switch,” but on those rare occasions when one does, I’ve now learned that I still must act on it every time.