When you click the box beside vacate title you would get the following popup
To make the contract looks less cluttered you can move the warning text to the pop up to confirm vacating the title
Now fighters can vacate a belt without harming the org(If they are above 100 hype). A fighter wouldnt have to feel obligated to stay in the org because he holds a title.
Maybe a fighter just wants to up the competition but also leave the org he is champion at on good terms.