I bought a rental property in 2007, and first let my brother and his wife live there for about six months, the only strange thing that happened was my sister-in-law fell down the stairs in the first week that they had moved in, and sprained her ankle.
Then when they moved out, I rented out the property to a woman and her daughter. In the first week the mother had fallen down the stairs and broke her leg. When the tenant mentioned it in passing, at that time I thought to myself how strange, as my sister-in-law had fallen down those same stairs. It's not like the stairs are old, slippery, but quite the contrary. The stairs are carpeted (new) and in a narrow stairway.
One time my husband and I went to the property to do some land scaping, when the tenant was at work. The next door neighbor came over to see what we were doing, and asked if we had any other people in mind to rent the property to, as he had known the tenant had given notice as she was transferring to another city for her job.
As we stood talking he mention something about this haunted house, and I asked him what he was talking about, and he said, "has your tenant not told you?", and this is what he said.
"Before you bought the property the house sat vacant for a while, and once in a while someone would come by to check it, but other than that nobody was living there. The people used to come by and find the upstairs window open and they would close and lock, only to find when they came back the windows would be open again. There was no evidence of anybody entering the property, and the alarm would have gone off.
Your tenant informed me that someone had pushed her down the stairs, when she first moved in, and they hear and see ghosts in the house." I started to laugh and, and said, "are you serious"?, and he replied, "yes, this is what she told me."
Later on that evening when we went home I called the tenant to inform her that we were landscaping in the yard today, and was speaking to the neighbor. I relayed to her what he had told me, and she replied, "Well, I did not want to tell you in case you thought I was crazy, but my daughter and I are very sensitive to this type of stuff, and there is a little boys who looks about 8 or 9, but my daughter is more than I, and she tells me there is also a woman here too. The little boy likes to play hide and seek, as he is always running around hiding behind stuff."
I also asked her about the stairs, and she said, "yes!" someone did push her, who, she is not sure, she thought it could of been a bad spirit, so she had a preist come by and bless the house.
She said, since she had told me that she is moving now every night she said she hears tapping on the walls, and someone walking around the house. She said it getting so bad its disrupting her sleep, and she cannot function properly at work in the day.
The tenant had also contacted a moving company to get a quote, so the man came by and was walking around the house, when all of the sudden he lost his footing, and fell down the stairs, thank God the only thing that was hurt was his ego.
The tenant's daughter is attending University in another city, and called to her mom and said, "be very careful as the little boy is mad you are leaving." She said, "I guess he see's me as a mother."
Well, since then the tenant's transfer did not happen, so she is now staying. She told me once the decision was made that she was staying, the knocking at night has now stopped.