Go to your My LIstia page and on the left side under your My Account, close to the bottom is Account Settings. There you will find "verify your account" and you need to use the "saved shipping addresses" and save the address you will want to use if you should bid on and win anything. Most sellers won't ship to an unverified ( not saved) address. Hope this helped.
If you have a facebook or a Twitter or both you can link it to your account and alot of people like to see facebook verification. I'm new too and still learning. I hope I helped some!