If someone claimed their account was hacked or they forgot the password, and they posted a signed message from a bitcoin address from 2 years ago, but the current owner is able to post a signed message from 6 months ago, which one would take precedence and who would get the account, the guy with the old address or the guy with the newer address?
precedence will first, just in case if the second not have proof, that legally acquired this account from original owner.