We need more input from
loginsam45 in this thread.
For now at least, I am not stating loginsam45 is telling the truth nor am I stating you are the one who is truthful but as a point of interest we should have some clarity on what was mentioned by _BlackStar. Can you sign any of your three known addresses from 2014/2015?
If you are unable to sign any of them please explain why.
Anyone is welcome to file their complaint but I am truly astonished by how openly he discusses his alternate accounts, a behavior that I have never witnessed before. If he can provide valid evidence, then undoubtedly, he will be able to recover his accounts accordingly.
I can truly say that newbie are making false claims if you make a disclaimer by signing your old bitcoin address before you change the account password. That's one of the best ways to make a disclaimer - but I don't have to force you to.
There are some old wallets you used in 2015 - if something never happened to you and the file store you should be able to sign messages from those addresses.
Why I am being asked to sign in messages. Since he (loginsam45) raised the complaint, he has to prove whether he is the owner of the account or not. Ask him and ask him to prove it. Why he is not come back to online. I am the owner of this account. When this complaint came up I tried to find my old wallets but couldn't find (2015). My previous devices have changed. If I had known that I would need my wallets later, I would have tried to keep them more carefully. If loginsam45 can sign the message then I will have nothing to say. But that is impossible, I challenged him.