On October 15, 2025, the United States Department of the Treasury’s Financial Crimes Enforcement Network (FinCEN) executed its most definitive regulatory strike against the Southeast Asian cyber-fraud architecture. The agency issued a Final Rule pursuant to Section 311 of the USA PATRIOT Act. It designated the Cambodia-based Huione Group as a "foreign financial institution of primary money laundering concern." This designation triggers Special Measure 5. It prohibits United States financial institutions from opening or maintaining correspondent accounts for or on behalf of Huione Group. This action effectively excommunicates the conglomerate from the global US dollar clearing system. It represents the financial "death penalty" for an entity that processed over $49 billion in cryptocurrency transactions between 2021 and 2025.

The ruling targets the entire corporate structure. This includes Huione Pay PLC, Huione Crypto, and the notorious online marketplace Huione Guarantee (rebranded as Haowang Guarantee in late 2024). Treasury data validates that these entities functioned not as neutral payment processors but as the central bank for industrial-scale pig butchering operations. The Section 311 action culminates a two-year forensic tightening that began with the July 2024 exposure of Huione’s merchant wallets. It serves as the primary regulatory anchor for the 2026 dismantling of the Prince Group ecosystem.