I’ve never seen or experienced anything, but I know extremely down to earth, formerly sceptical people who have.
A niece and her family moved into a large old property , bits of which dated back at least 200 years. The family never sensed anything creepy or untoward, but their dog - a normally chilled and happy animal - refused absolutely to set a paw over the threshold of a certain part of the house.
Niece mentioned it to neighbours, and someone local - said to have ‘the gift’. - offered to take a look. (I might add, she was unpaid.). What she said was that there had once been a tragic but unintended death, and the person responsible was still there, out of guilt.
At any rate, she asked him to leave, and he evidently left, because after that the dog was perfectly happy to enter that part of the house. (I’m sure the scoffers will now tell me that the dog had imagined it…).
A friend’s sister and her husband bought a house that seemed like a bargain - the former owners were in a hurry to sell. After a fairly short time, after her husband had as usual left very early for work every morning, the woman (still in bed) started to ‘sense’ that someone was sitting on the end of the bed.
Although it didn’t feel at all threatening, the sensation grew stronger, and she ‘knew’ the presence was male. Obviously it was very unsettling though, and eventually a medium was called in.
She said his name was Albert and he was an old soldier. She asked him to leave, and presumably he did, because the sensations ceased. But the couple then knew why the former owners had been in a hurry to sell at a bargain price!