For my birthday a few years ago, my sister booked a medium. She did not know me, I did not know her. My late mum talked to me through her. I have a recording of the session (she was very honest). Quite a bit was wrong - but rather more was accurate.
You may need a hankie.
Many, if not most, are, of course, charlatans, but sometimes (just sometimes)I 'know' things and I am prepared to believe that some people can 'tune in' to I-don't-know-what.
The things I just 'know' (on no grounds whatsoever) have always been correct.