You may have free tickets from Ticketmaster and not even know it

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Crowd at Windy City LakeShake Country Music Festival (Photo by Rick Diamond/Getty Images)

Thanks to a $400 million class-action lawsuit, Ticketmaster is paying customers back for years of high processing fees with free tickets.

Anyone who bought tickets through the Ticketmaster website between October 21, 1999 and February 27, 2013 is eligible. That amounts to about 50 million people. And while Ticketmaster allegedly sent emails to all of them, between spam filters and out-of-date account information, you may have never even heard about it.

To find out if you have any free tickets, log into your account and click the “Active Vouchers” link. If you received any vouchers or discount codes they should show up on that page. Each Ticket Code can be redeemed for two general admission tickets. However, they’re only available on a first-come-first-serve basis for select events, which will be listed on a dedicated website as they are added.