Sweepstake sponsors must not suggest that players have to pay to enter, or pay to win, because this would constitute illegal gambling. Sweepstakes usually involve enticements to enter a consumer promotion with prizes that can be substantial amounts of money, high ticket items like cars and vacations or smaller prizes that are currently popular with consumers. There should be no monetary cost to the entrant and sweepstakes winners should not have to pay a fee to receive prizes.

Here on LawServer you’ll find relevant state laws about sweepstakes.