I saw my father in either 2001 or 2002, a number of years after his death. I was in that gentle place between asleep and awake, so you can call it a dream or over-active imagination if you wish, but it was real. I am not given to supernatural experiences - this was the first one that I had ever experienced and I don't have much imagination, nor do I remember dreams too well, as a rule.
My father was with another man who I did not recognise at the time as Pete Sanderson, "Sandy", a colleague of mine from the 1960s who was friends with my father too. Sandy had died in 1978 and a newspaper reported on his death, printing a photograph with the article. The robust, sandy-haired, clean-shaven man that I had worked with had morphed into a balding, bearded imposter. In my dream or imagining, he appeared as per the photograph, and it was several days later that the memory of that newspaper photograph, from 20+ years before, floated to the surface of my mind. Given their bonhomie and friendship, it is logical that Sandy & my father might have "teamed up" on the other side, assuming that there is an "other side" and that logic applies there.
My father and Sandy were waving me towards them, friendly and welcoming. As I got closer to them, the welcoming wave changed into a clear signal to go back, to go away. It was confusing and I puzzled about it over the course of the next few days.
A few years later, I was diagnosed with cancer. Such a diagnosis does tend to make one reflect, and I recalled having seen my father, and Sandy, in the dream or whatever you wish to call it. I like to think that my father had got the year of my cancer (and the eventual outcome) wrong and had been there to help me over, but realised his mistake at the last moment.
I'm not convinced that there is an afterlife, but sometimes, just sometimes, you do wonder if there is someone watching over you ....