To get verified you need to go to the actual website www.listia.com You can't do it from the app- if that's what your using.
Go to the web browser on your laptop phone tablet- what ever u are using. Sign in. On the top right you will see your name and profile photo. Click that- and a scroll down menu appears. Click the option "my listia" ((I believe it's the first option))
This will take you to your home page. Where you can see all your messages, auctions you are watching or won. Etc.
On the left of this page you will see a column with many options to choose such as Messages My auctions Won Fans Comments
And So on. Scroll down a bit until you see it will say VERIFY MY ACCOUNT VERIFY ADDRESS SAVED SHIPPING ADDRESS. And things like that. Click on them and verify your account and address.
There are plenty of ways to verify your account. You can verify through Facebook or twitter. You can verify by phone-they send you a code via text n you confirm code. You Can verify through a bank or credit card. Etx