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I'm going to add a new meta tag today, but I'd really like to see the last year's worth of data. It's hard to gauge site performance now without it.

A Google verification meta tag was created and implemented on a site that I am now responsible for (I took over an SEO project after a long lapse), but no one seems to know what Google account was used to create the meta tag in the first place.

I'm finding it very difficult to backtrack from verification meta tag to the Google account, and all the online help is for those having trouble moving forward with the verification.

Any suggestions or advice?