I may have done that already. Many years ago, I rented the basement in a large house. At one point, the upstairs tenant informed me that I'd been sharing my digs with a ghost, who occasionally ventured upstairs. Supposedly, the ghost moved out out some time after I moved in. Apparently I had grossed out the ghost!
My upstairs neighbor was dead serious about this, if you'll pardon the pun. He really believed what he was saying. However I do not see ghosts. And this story is second-hand, even though I was an active participant!