just go to Listia.com, on the left side scroll down until you see the box that says, 'Account Settings', then in the box choose, 'Verify My Account'. It will give you options to verify you account as a new member of either or both, verifying your phone number and/or your bank account or credit card. Once you have verified your account, you will receive the, 'I am Listia verified' badge, as well as badges for your phone number and bank account or credit card badges, respectfully. Having either of the social media sites, Facebook and Twitter, does not mean you are verified, they only show that you use(d) those sites to sign in to Listia.
Being a verified member of Listia gives other members confidence in bidding on your auctions, which can give you more credits at the end for your auctions! Thanks! And Welcome to the Listia Family!