Kalshi sends cease-and-desist to Elizabeth Booker

Kalshi, a U.S. event-based trading platform, sent a cease-and-desist letter to Democratic influencer Elizabeth Booker Houston over her use of the company’s name and imagery on social media. Booker Houston removed the contested posts and stopped the linked promotions after receiving the letter.

Kalshi notified Booker Houston that certain posts and promotions used the company’s name and materials without authorization. Booker Houston removed the content shortly after receiving the notice. Neither side filed a public lawsuit or disclosed further litigation at the time of the notice.

The letter focused on posts that linked to or referenced the platform and used Kalshi branding. Kalshi did not publish the cease-and-desist letter or provide an extended comment about the exchange.

Booker Houston confirmed she complied with the request but did not issue a detailed public statement about the content that prompted the letter. No additional legal action was reported by either party.

Kalshi operates a U.S. marketplace that lets users trade contracts tied to real-world events. The company enforces branding and usage policies to avoid third-party promotions implying formal endorsements or partnerships.

Companies that operate online trading venues often monitor public mentions and third-party promotions to ensure compliance with advertising standards and to avoid misleading users. In this instance, the dispute was resolved through removal of the contested material rather than court action.