Delayed ticketing is an additional security measure that Ticketmaster applies to some events in particular. It involves activating your tickets a few days before the event takes place. We do this to avoid loss and/or theft of tickets, so don't be surprised.
When you buy your tickets, you will receive your purchase confirmation. A few days before the event, you will be able to access your tickets in your Ticketmaster account from the mobile app or from your computer. There they will be!