Maximum Value: Up to $80 each/$160 total; this original certificate must be presented at the time you pick up your tickets at Guest Services (will-call) on the day of the performance. Duplicates or copies will not be accepted. Lost or stolen certificates will not be replaced. This certificate is based on concert seating and availability and expires 12/30/18. There are no extensions offered on the expiration date. This certificate is not eligible for New Year's Eve, DSO Youth Concerts, Holiday or Gala performances.