To sign out from your account on Tiege.com, click on the "Account Details" tab and then click "Sign Out" in the lower left corner.
If you're using a mobile device, "Account Details" can be found on the navigation bar by scrolling to the right, or if you don't see it rotate your phone, and it should appear on the horizontal (landscape) view. Once you're in Account Details, you'll see the Sign Out button.