If it's something you've personally experienced, Peace Of Mind, no proof is necessary. I have a hard time convincing my partner that he's been here many, many times (although I remember us together in different ways, in different places!
), but I understand that I've remembered the experience and he doesn't/hasn't yet, so there's really nothing I can say/do to convince. There are tons of stories all over the place (they've even been on the news!) but, until you've experienced it yourself, nothing will convince you. And I think a lot of people here have experienced it in some form or another, which is why we talk about it with such acceptance.
<3