French gambling regulator orders ISPs to block Polymarket

France’s National Gambling Authority has ordered internet service providers to block access to Polymarket as it considers prediction websites to be illegal gambling.

Formally known as Autorité nationale des jeux (ANJ), the regulator said in a statement on Friday that Polymarket’s operations are not authorized in France and that advertising unauthorized gambling sites constitutes a criminal offense with fines of up to 100,000 euros ($114,000).

Prediction markets allow users to buy and sell contracts tied to the outcomes of future events, from elections and sporting events to economic data and geopolitical developments. Polymarket has surged in popularity over the past two years, with billions of dollars in worldwide trading volume, while drawing scrutiny from regulators over whether its event contracts constitute illegal gambling or unlicensed financial products.

Access to Polymarket has been blocked by authorities in Singapore, Poland, Portugal, Hungary, Ukraine, Brazil and Indonesia. At press time, Polymarket said it is geoblocked in 36 regions.

France’s gambling regulator first shared plans to block the platform in November 2024 for failing to comply with national gambling laws.

Related: Polymarket hit by $2.9M theft, users to be refunded

French gambling authority cites outcome manipulation concerns

French authorities said Polymarket boasts “addictive features” that are similar to regulated gambling offerings, but “amplified by the absence of the protective mechanisms found in the legal gambling market.”

It also cited potential outcome manipulation tied to some event contracts on Polymarket, adding:

“Some of the bets offered on this platform appeared to be rigged: for example, bets on the weather revealed that weather sensors may have been hacked.”

The cybercrime unit of the Paris Public Prosecutor’s Office launched an investigation into this matter in May 2026 and found a lack of identity verification, such as Know Your Customer (KYC) checks.

Prediction markets have also drawn scrutiny from regulators in the US. On June 17, Kentucky sued five prediction market platforms, including Kalshi and Polymarket, accusing them of operating unlicensed sports betting platforms. At least 17 other states have followed suit.

The Commodity Futures Trading Commission in turn has sued eight states, charging they had interfered with the federal regulator’s exclusive authority over federally regulated event contracts. 

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