Second-chance drawings give entrants another chance to win after a regular sweepstakes entry period has ended.
Second-chance drawing winners can be drawn from the pool of people who have already entered, or they can be presented as a separate entry period with its own drawing.
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For example, say that a popular beverage company holds an under-the-cap giveaway, where people enter codes found under bottle caps of sodas into a website to find out whether they've won a prize. As you can imagine, many people won't check their codes to find out if they're winners, so many of those prizes won't be awarded during the regular sweepstakes period. A second-chance sweepstakes gives the sponsor an alternative way to award these unclaimed prizes.

