Cal. Business and Professions Code § 17539.2

Every person who conducts any contest shall: (a) Clearly and conspicuously disclose on each entry blank the deadline for submission of that entry. (b) Refund all money or other consideration to contestants requesting such refund in writing within one year of payment and who are unable to participate in any aspect of any contest through no fault of the contestant. (c) At the conclusion of the contest send to all entrants upon their request the names of all winners, the prize or prizes won by each, the correct solution to each puzzle and the winning solutions to each puzzle (if different from the correct solution). (d) Maintain for no less than two years after all prizes are awarded all the following: (1) Copies of all contest solicitations and puzzles. (2) All puzzles and correspondence sent by a contestant or copies or records disclosing details thereof and records of replies thereto. (3) Adequate records which disclose the names and addresses of all contestants, the approximate date each contestant was sent each puzzle or game, the number of prizes awarded, the method of selecting winners, the names and addresses of the winners, and facts upon which all representations or disclosures made in connection with the contest are based and from which the validity of the representations or disclosures can be determined.