Dutch gambling regulator rejects Polymarket appeal, upholds illegal gambling sanction
The Dutch gambling regulator Kansspelautoriteit (KSA) has rejected Polymarket's appeal and upheld its enforcement action against the prediction market platform. The decision confirms the KSA's position that Polymarket's operations constitute illegal gambling in the Netherlands. The ruling is finalized and not subject to further appeal within the Dutch regulatory system. Polymarket had challenged the regulator's earlier threat of fines.
Polymarket's Dutch enforcement loss adds another unregulated-market classification to its ledger, eroding any perceived regulatory advantage abroad. The KSA ruling is binding, so Polymarket must now geofence Dutch users or risk escalating fines and potential criminal referral to Dutch prosecutors. Legal teams must manage this European front alongside the Italian blacklisting that already turned its Lazio sponsorship into a liability poster case, plus South Korean and scattered U.S. state actions.
Each new jurisdiction that dismisses U.S. federal labels as locally meaningless sharpens the strategic question: whether to fight market-by-market or retreat to a narrower geographic footprint. Competitors like Kalshi, facing identical preemption failures in New York and elsewhere, are watching which approach Polymarket chooses. The Dutch decision signals that European regulators will not defer to U.S. federal labels when enforcing national gambling codes.