Once a quiz has expired it will no longer be available for purchase or submission. If the quiz has already been purchased, users will not be able to take it after the expiration date, if they have not submitted it. There will be a message display as shown below.
When a user purchases 2 or more of the same quiz, they will be given a redemption code that can be redeemable for the number of quizzes bought. The code can be redeemed by other users or the purchaser.