Since I have a famous past life (two actually) and I've trod that path and I'm wondering if that's what you're asking about in a roundabout way, let me say a few things.
The burden of proof is higher, especially if it's a documented past life. Meaning that that there are ample photos, documents and information about this person and their family that are available to anyone.
Yes, that makes it easier for fakers to pose as them, but! It also makes it easier for you to prove your past life to us, or to yourself, as you also have plenty of documents available about you and your family.
As an example, I share the same birth date with both of my past lives and I've posted my DOB from my driver's license here as well as facial comparisons to both of my past lives. You can see and read about it in the link in my signature.
In doing that, I wanted to maintain 100% transparency and I also wanted to document it for myself. I believe the facts will show the truth and that's what I was interested in finding. If it turned out I was a Mongolian garbage man in my past life, so be it if that's what the facts told me.
The second thing is what are most interested in about this past life? For me, when it really sunk in, I felt bad and guilty. I didn't know why I knew what I did and I didn't think it was fair that I was special in anyway. Learning what I have has helped me tremendously as far as my life and understanding my family goes. But I still don't know why I've been given what I have.
I believe that if we are genuinely guided to a past life, it's to resolve an issue of one sort or another and that will quickly take over the focus of your research.
In contrast, if you're finding that you're giddy with glee saying "I knew it! I just knew I lived in a big castle because all I ever did was draw castles as a kid!" you could most likely be making the facts fit your fantasy.
For most of us, when we have a genuine discovery, we start feeling sick, dizzy even and are often stricken with a gut wrenching grief. When we connect with a past life and we realize the things and people we've lost, it's not an easy process to go through.
Long story short, if you were this person, you should be able to prove it to a convincing degree and you should also be interested in something other than the life itself. As in, how does this being revealed to you help your current life?
But speaking as a representative of the forum, I will tell you that no one is forced to prove or reveal anything. We don't expect it and we don't ask and that's because we respect everyone's comfort levels.
If you're not sure of your past life and you're not sure if we'll believe you or not, the best thing to do (in my opinion) is not to mention it. And instead, focus on the aspects of your research we can help you with. Also feel free to use the Private Message function to ask any of us for help with your research.
But really, the defining thing here is your intent; do you want attention or help? We are here to help and actions tend to speak louder than words, so what you reap you will sow etc etc.
Don't take any of this too much to heart.
Just start off slow by maybe starting your own thread and documenting your research and telling us your story. You don't even have to mention the name.