- Missouri AG Catherine Hanaway has issued cease-and-desist letters to multiple prediction market operators, including Polymarket, Kalshi, com, Novig, Underdog, and Robinhood, over allegations that the operators are facilitating sports event contracts, which constitutes unlicensed sports wagering under Missouri law.
- In 2024, Missouri residents approved Amendment 2 to legalize and regulate sports betting, with the Missouri Gaming Commission responsible for oversight, and launching the market on December 1, 2025. Wagering is permitted both through licensed mobile and online platforms and in person at authorized locations, with a 10% tax on sports betting gross receipts. The framework in Missouri also requires that no one under 21 years of age place a sports wager, but AG Hanaway alleges that underage users are able to access and use these prediction markets.
- The AG argues that the operators should comply with Missouri law without delay and cease and desist from offering sports event contracts to Missourians unless and until they are licensed by the Missouri Gaming Commission. The AG further states that failure to comply with the cease-and-desist will result in enforcement action by the State of Missouri.