LIVE Hyperliquid whale tracker: the largest open positions and what they are doing, updated every few minutes →
Home / Glossary / Cease-and-desist letter
Regulation

Cease-and-desist letter

A formal demand from a state regulator that a company stop an activity, in this context offering sports or election contracts to that state's residents.

BetG8 Editorial · Reviewed November 6, 2026 · Not betting, legal or investment advice

Since early 2025 more than a dozen state gaming regulators have sent cease-and-desist letters to Kalshi, Robinhood, Crypto.com and later Polymarket US. The letters assert that event contracts on sports are unlicensed sports betting under state law.

A letter is not a court order. Kalshi responded by suing several states in federal court for an injunction, with mixed results: wins in New Jersey at the district level, losses in Nevada and Maryland on appeal.

BetG8 tracks every letter, suit and ruling by state. The practical question for a resident is whether the app still works where they live, which depends on the venue's geofence, not the letter alone.

📱 Compare how the same event is priced across venues on Polymtrade.Referral link. 18+.

Where you will see it on BetG8

More regulation terms

Frequently asked questions

What does "Cease-and-desist letter" mean?
A formal demand from a state regulator that a company stop an activity, in this context offering sports or election contracts to that state's residents.
Why does cease-and-desist letter matter for prediction markets?
BetG8 tracks every letter, suit and ruling by state. The practical question for a resident is whether the app still works where they live, which depends on the venue's geofence, not the letter alone.