Have you tried following the account deletion procedure?
To delete your Google Account, follow these steps:
1.Sign in on the Google Accounts homepage. (If you forgot your password, you can reset it).
2.Click Edit next to the "My products" list. If you don't see the Edit link, your account was likely created through an organization or
company. To delete your account, talk to your domain administrator.
3.On the following page, click Close account and delete all services and info associated with it to delete your account.
4.Confirm your account deletion. To do so, you'll need to select these two options: "Yes, I want to delete my account," and "Yes, I
acknowledge that I am still responsible for any charges incurred due
to any pending financial transactions." (You can safely select the
latter option if you haven't used any of Google's paid products, such
as AdWords and Google Checkout, or if you have no pending financial
transactions related to these products.)
According to Google Support you can use the recovery link on this page: Recovering sign-in information
![Forgot your username feature](https://i.stack.imgur.com/ezBaf.png)
From here, you should try with all accounts you are associated with to see what accounts are linked. (Assuming you remember all email accounts used apart from the one you forgot). It is sort of hit and miss but it has worked for me on two separate occasions.
You should get an email similar to the following.
Your recovery address, phwd@gmail.com, is associated with:
xxxx@gmail.com
xxxx@gmail.com
xxxx@gmail.com
xxxx@gmail.com
xxxx@gmail.com
To sign in, visit the link below.
http://www.google.com/accounts/
If you've received this mail in error, it's likely that another user
entered your email address by mistake while trying to recall their
username. If you didn't initiate the request, you don't need to take
any further action and can safely disregard this email.
If clicking the link above does not work, copy and paste the URL in a
new browser window instead.
Thank you for using Google.
For questions or concerns regarding your account, please visit the
Google Accounts FAQ at http://www.google.com/support/accounts/.
This is a post-only mailing. Replies to this message are not
monitored or answered.
As seen above it works for multiple accounts. So any account that has phwd@gmail.com listed is brought up in the list.
Additionally you can search your email accounts for the following subject line
Your Gmail address has been created
This will bring up (if you didn't delete it), the confirmation email messages of all Gmail accounts you used the current account as a recovery point. Although, based on "used in ages" I am not sure how far back Google used to send out this message.
Best Answer
No, the alternate email address cannot give you full access over your own account in case you lose your phone. The email address is only for additional protection for users signed up for 2-step verification.