If you bought a ticket through Ticketmaster between late 1999 and early 2013, you could be eligible for free tickets to a number of events.

An email sent to eligible Ticketmaster customers includes instructions on how to get vouchers for free tickets to selected events as well as discounts on Ticketmaster purchases. Those who bought a ticket through the company between October 21, 1999, and February 27, 2013, are eligible. The vouchers expire in four years.

The vouchers are the result of a class-action lawsuit over ticket fees and other charges.

Billboard magazine reports that about 50 million people are in line to receive the vouchers.

Ticketmaster is now part of Beverly Hills-based Live Nation Entertainment Inc.