"notified-NotifyUserHUG" and "verify-NotifyUserHUG" query?

Asked by Google, but what is it?

[Marino]

Hello,

I noticed these two requests in my access log :
/notified-NotifyUserHUG-May08?aHR0cDovL3d3dy5tYXJrdXA[... long string ...]haXNlLQ==
/verify-NotifyUserHUG-May08?aHR0cDovL3d3dy5tYXJrdXA[... long string ...]haXNlLQ==

They have been issued by a query in Google. What do they mean? Are they like the "Slurp 404" test pages?

Regards,

Marino

[dan404]

Did you verify a site in webmaster tools recently?

[Marino]

Yes, I did. Does it relates to?