I agree. Show it here.
If the person has manifested himself in a physical form (i.e he was there and the photo merely caught him) or a photostatic form (i.e he has appeared through telekenetic energy, captured only on film) then either way he is letting somebody know he is still about.
He could be in a number of situations. If he was Catholic, his fate is still being decided and he is is neverworld (limbo, Purgatory etc).
He could be caught in a celestrial time queue whereby his spirit has passed but he has lost his way and is seeking directions.
He may be your guardian Angel and is possibly warning you of some future danger. He is looking or appearing to indicate anything on the photograph?
He may just be saying hello or on a wind up. Was he a michevious little scamp in life? A practical joker?
There will be no harm in showing the photo here. I would advise blocking out any personal details and do not print his real name, but there will be no harm in showing people. .
Also, do not for one minute attempt to make any cash from the photo.
All the best, and remember the afterlife is all around us.