The case stems from complaints received about ticket purchases for a Bruce Springsteen concert. Ticket seekers were redirected from the main Ticketmaster site to a subsidiary that charged more.
Milgram says Ticketmaster has not admitted wrongdoing but has agreed to pay $350,000 to the state.
She says the company will also compensate ticket holders who complained and change how it handles secondary sales.
Ticketmaster did not return calls seeking comment Monday.
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