Originally Posted by easyhostmedia
That I agree with, my upstream provider check my site files and the deep server logs going back to when this happened and not outside access to site and no other HTML file added to my site. Google should be at least trying to work with me to figure this out rather than just say tough contact the other person as we are not going to take action against them. I did using my Yahoo account email this other gmail account and as expected then have not replied, which if you were the scammer would you reply. ( i suspect the gmail account was set up to do this and is unchecked)
What about your domain name provider? Could it be possible that the spammer/hacker temporarily modified the DNS so it directed the domain to his/hers web server, to which he/she could easily upload the verification file?
That's a stretch, sure. However, I just cannot imagine any other way for the person to have used the HTML verification function without any kind of access to your server itself. (other than having your host lie regarding the integrity of their network, which is unlikely)
Also, what possible reason would this person have to link your domain with his account? It isn't like he can do much with your domain. (webmasters is mostly a statistical tool that enhances your appearance online)
Either way, I wish you the best of luck getting everything sorted out.