Polymarket, the leading prediction market platform, is intensifying its Know Your Customer (KYC) procedures and cracking down on VPN usage as it faces mounting regulatory pressure. This shift marks a departure from its traditional permissionless trading model. The platform is urging traders to voluntarily verify their identities while implementing stricter measures against accounts using VPNs to bypass geographic restrictions. Users engaging in high-volume trading activities are particularly targeted for verification under anti-money laundering protocols. The changes come as Polymarket responds to demands from the House Oversight Committee for KYC and geographic enforcement records by June 5. While basic wallet-connect trading remains available for most international users, the platform now enforces stricter compliance, especially in jurisdictions with stringent gambling regulations or those under OFAC sanctions. The U.S. arm of Polymarket, which requires full KYC following its acquisition of a CFTC-licensed exchange, remains separate from the international platform. These measures aim to mitigate regulatory risks but may diminish the platform's appeal to privacy-focused traders.