I believe in doppelgangers.....my stepfather had passed away a few months back and I was at work and this man came in and he looked so much like my stepdad that I had to go to the break room to get my bearings, my stepdad always wore cowboy shirts, and boots had a Texas accent was tall and skinny dark hair worn in a buzz cut ( retired military) this guy was him to a t I like to think it was my stepdad letting me know he was okay

I absolutely believe it . Have seen many of people I know .
A few months back I saw one of my best friend who sadly committed suicide 14 years ago . It was just like she was there next to me and not actually this other person . It absolutely broke my heart and I had to remove myself from the situation in a very upset state

I read a book by a psychic that could see dead people, and he said ( and I totally believe this) that when a person who has passed appears to us that they are wanting our prayers so they can go on in their journey , he said there is no hell just kind of a purgatory where a soul has "steps" ( for lack of better word) on their way to heaven. I can't remember the author's name or even the book name but I believe what he believes ....

My husband visited me in a dream about one month after he passed. I was with friends and he did not speak, but insisted we had made a time to leave. He put his arm around my waist, to lead me away with him
In my head I was saying, "We never made this time, this appointment, why are you trying to take me with you" I turned to look behind me and a man was watching us.
I asked for an interpretation of this dream by someone renowned for discerning the spirit world.
She said he was letting me know he will help me and be there for me when my time to pass comes. But it is not now.

Happens to me occasionally. Someone will tell me they saw me somewhere and I knew I wasn't there. Got that kinda face I guess.