Booking protection is available at the point of purchase for most, but not all events.
It is offered by TheTicketSellers to protect your booking and provide you with an option to refund if you're unable to attend due to a number of reasons. It is not available to buy after your tickets have been purchased, and does not cover you if you change your mind about attending the event.
Please read the full terms and conditions here.
If you have purchased Booking Protect and would like to make a claim visit their site here