If you are in a vulnerable state then you might give away information that they could use to create a reading. You have to be smart, do not tell them anything at all, not who the person is, what sex they are, when they died, nothing. Absolutely nothing. If they then come up with information they could not possibly have known then maybe they are genuine. Don't forget they may find something on social media. Some mediums are genuine but some are not. Also, they have no control over what comes through, so if nothing happens then it means they are not receiving anything. Some mediums are much better than others and may receive something whereas a different medium may receive nothing. Good luck but be careful.