Are you looking to use your tickets from last years U2 concert that was postponed due to an injury Bono suffered?

If you have tickets for the 2010 dates in Anaheim then you can either get a refund or they will be accepted for a date in 2011. But be sure you check with Ticketmaster or Live Nation as the date you had in 2011 most likely will not be the same in 2011. In my case the tickets for Sunday June 6, 2010 got moved to Friday