Complete this and you're good to go.

Enter the requested information, and we will do the rest.
Be sure the email address you enter is valid, and the referrer email is the person who invited you. If you are the first from your group, enter your email as referrer too.

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If someone asked you to reserve or join their circle, please enter their email address. No referrer? leave it blank.

This is the email address that invited you to join.