From Monday all seats that have not been renewed will become available for sale. The ticket office is open until 5pm tomorrow (Saturday) to allow you to complete your renewal.
There is a waiting list for tickets that become available.
Fans who have renewed but want to swap seats will be able to do so upto midday on Monday and on Tuesday & Wednesday.
Full details are available here on the official website.
Source: Cardiff City Online
Source: FOOTYMAD
