Originally Posted by
ecaarch
If I was the OP, I'd check my inbox for the confirmation email with the ORIGINAL ticket number and compare that to what's showing up CURRENTLY on delta.com. If it's the same number, the ticket was never reissued (somehow got stuck in the queue) and the remedy lies with DL. It's happened to me before, and I would not try to sort it out at the airport - def sort it out now.
This isn't the case necessarily anymore. They've been revalidating tickets more often lately.