I'm not sure the context of your question. What exactly are you trying to accomplish? Is this question about your Adobe ID?
With a bit more detail, we'll try to help or at least point you in the right direction.
I think this is the information you're looking for: http://helpx.adobe.com/x-productkb/policy-pricing/account-password-sig n-faq.html#id_11320
Let me know if I've misinterpreted your need.