Portugal’s gambling regulator has fired a warning shot across the bow of decentralized finance, showing that "onchain" does not mean "above the law" in the eyes of Lisbon.
Lisbon Lockout: Portugal Orders Polymarket Block Following Election Betting Surge
20 January 2026 - 15:30 CET
By Stu Clelland
On 20 Jan, the Portuguese Gaming Regulation and Inspection Service (SRIJ) issued a mandatory cease-and-desist order to Polymarket, the world’s largest decentralized prediction market. The platform has been given 48 hours to terminate all operations within the country or face network-level blocking by local internet service providers.
The crackdown follows a massive surge in platform activity during the Portuguese presidential election on 18 Jan. According to reporting from Renascenca, more than €103mn ($120mn) was wagered on the outcome of the race before official results were released.
Regulators grew particularly concerned when €4mn ($4.7mn) in volume flooded the presidential markets in the final hours of voting, with odds for Socialist candidate António José Seguro jumping from 60% to 95% while polls were still open.
The dramatic shift suggests that some users were trading on leaked exit polls or non-public data, effectively front-running the democratic process.
Election bet surge triggers crackdown
The SRIJ has been blunt in its assessment: Polymarket is operating an illegal gambling business. Portuguese law is notoriously rigid regarding "games of chance" and prediction markets.
Under the country's Legal Framework for Online Gambling and Betting, only licensed operators can offer wagers to residents, and political betting is strictly prohibited. The regulator noted that because Polymarket does not hold a Portuguese license, it cannot offer the consumer protections required by the state.
This is not just a local skirmish. It represents a broader European discomfort with the accuracy and influence of onchain forecasting. While Polymarket advocates argue that the platform provides a more precise sentiment gauge than traditional polling, Lisbon sees it as a threat to electoral integrity.
The regulator also said it is concerned about the inability to identify participants, as the platform operates via decentralized smart contracts rather than traditional Know Your Customer (KYC) protocols.
Regulatory trap for decentralized protocols
Portugal’s move mirrors the "all-or-nothing" approach seen elsewhere in the EU and Hong Kong.
By treating a global, decentralized protocol as a localized gambling site, the SRIJ is attempting to force a square peg into a round hole of legacy legislation. This strategy of "block first, ask questions later" is becoming the standard response for regulators unable to keep pace with the speed of onchain capital.
As previously reported, while some jurisdictions like Bermuda are embracing onchain rails for their national economies, European nations are increasingly building digital moats.
The SRIJ has warned that it cannot guarantee the recovery of funds for any Portuguese users caught in the block. If Polymarket fails to comply by 22 Jan, it will join a growing list of "shadow" platforms, including those in France, Belgium and Romania, that are technically accessible but legally radioactive for European residents.
