Anet Happy Holidays Card

I'm not sure if this classifies as a basic question or not, but does anyone know if our account information contails details of our address as well? I don't remember inputting one when I created mine... it was just an e-mail address and a password. If that is the case, where in the world did Anet get our addresses from? o.O

It is required to put your address when you register I think. Maybe you forgot about this step.