Guarantee marketplaces: laundering for hire

As of September 2026: The Xinbi designations and asset restraints are recent US actions, and the FinCEN proposal to extend the Huione measure to H-Pay Service PLC is a proposed rule, not a final one. Figures such as the $24 billion total are Treasury's estimates.

Most laundering explainers describe a technique: structuring, shell companies, a trade invoice. The newest enforcement actions describe something different, a marketplace. Two names keep appearing in US actions: Cambodia’s Huione Group and the Chinese-language Telegram marketplace Xinbi Guarantee. Neither is a single trick. Both are places where criminals could buy laundering as a service.

What a guarantee marketplace is

Criminals have a trust problem. A scam operator who needs proceeds cleaned, or a fake investment website built, is dealing with strangers who have no reason to be honest. The guarantee marketplace solves that with escrow. According to Treasury, Xinbi acted as an escrow service: a buyer’s payment was held until the vendor finished the job, then released. That is the same model legitimate online marketplaces use, applied to services such as “washing” scam proceeds.

Treasury said Xinbi has processed the equivalent of more than $24 billion in digital assets and cash since it launched around 2022, mostly in Southeast Asia. Prosecutors say vendors on the platform advertised laundering, website building and recruitment for scam compounds under one roof. That concentration is what makes these hubs valuable to criminals and, for the same reason, valuable targets.

Why it works

• Trust without contact. Escrow lets strangers transact without knowing each other.
• One-stop convenience. A scam operation can buy several services from one storefront instead of building relationships with separate providers.
• Fast, cross-border rails. Dollar stablecoins and OTC brokers move value across borders in minutes. See stablecoins and OTC brokers for how those conversions work.
• Rebranding. When pressure builds, the business changes name, wallet or app. Treasury noted that Xinbi moved operations to a messaging app and launched its own wallet after law enforcement scrutiny in mid-2025.

The response: hit the hub, not the hop

Investigators cannot chase every transfer, so recent actions target the hub itself.

FinCEN’s final rule of October 15, 2025 used Section 311 of the USA PATRIOT Act to cut Huione Group off from US correspondent banking. In June 2026 FinCEN proposed extending that measure to H-Pay Service PLC and any successor entity, aiming to make the designation follow the business rather than the brand.

On September 9, 2026, the Treasury designated Xinbi Guarantee as a transnational criminal organization, along with Singapore-based SafeW Technology and Cambodia-based Anwen Technology, which developed a wallet for the network. The same day the Justice Department’s Scam Center Strike Force announced seizures and the restraint of more than $52 million in cryptocurrency. Treasury said the action was coordinated with the United Kingdom’s Foreign, Commonwealth and Development Office.

What investigators look for

• Wallet clusters that receive from many unrelated victims and forward funds in bulk.
• Accounts whose activity matches an escrow pattern: a payment held, then released on a fixed schedule.
• Links between a wallet and a known marketplace, including prior designations.
• Stablecoin flows that reach a cash-out point such as an exchange or OTC desk, where identity checks apply. The chain-hopping page covers how investigators follow value across chains.

The takeaway

The lesson from these actions is structural. Laundering is increasingly an industry with storefronts, escrow and customer service, and the effective countermeasures are the ones that go after infrastructure: sanctions, banking cutoffs, seizures and cooperation between regulators and stablecoin issuers. For how those signals become cases, see the detection section.