To redeem your Mariners flex tickets you must bring your original undated vouchers to the Trusted Choice Box Office at the Cross Insurance Arena. Ticket plan holders will receive an email notification when redemption begins. The Trusted Choice Box Office is open Monday-Friday 9am-4pm and is open Saturday’s and Sunday’s on event days only. The Cross Insurance Arena is located at 1 Civic Center Square in Portland, Maine. The box office can be accessed by entering from both the Free Street and Spring Street sides of the building.