An agreement is the meeting of the minds. It is made when two parties reach a mutual understanding on a particular issue.
In the context of sweepstakes, contests, and raffles, agreements, such as the official rules, liability releases, and publicity releases may also be considered as legally binding contracts between the Sponsor and giveaway participants.
For sweepstakes, contests, and raffles, the official rules are a legally binding written agreement between the participants and the Sponsor of the promotion. The Sponsor must create and display official rules in order for a promotion to be considered as a legal giveaway in most jurisdictions.