If fully paid for you can probably sell it depending upon it's desirability. Most don't sell for much however and many are sold for $1 on Ebay and the like. Surrendering is pretty unusual. If they have someone paying the MF, they don't like taking them back. It has been done but I think it's rare. Others may be able to give you more information about your particular timeshare but I thought I could get it started.