On October 2, 2026, the Ohio Casino Control Commission sent cease-and-desist letters to 10 prediction market operators demanding they halt unlicensed sports event contracts and provide written compliance confirmation by October 16, 2026

From the articlePolymarket Takes Ohio to Federal Court, Citing New CFTC Rules After Kalshi's Appeals Loss - UnchainedAlso in Polymarket US sues Ohio over sports contracts enforcement, Polymarket US Sues Ohio to Block Sports-Contract Crackdown