US Treasury Acknowledges Mixers Have Legitimate Uses, Urges Congress to Enable Crypto Transaction Holds
March 8, 2026 | Policy
The US Treasury Department submitted a formal report to Congress this week acknowledging that lawful crypto users have valid reasons to use mixing services, while simultaneously recommending new legislative authority to temporarily freeze suspicious digital asset transactions pending investigation. The report, titled "Innovative Technologies to Counter Illicit Finance Involving Digital Assets," was filed in March 2026 under a mandate from the GENIUS stablecoin legislation. It marks the first time Treasury has offered such an acknowledgment in a formal legislative submission, representing a meaningful change in how Washington frames privacy tools in crypto.
Treasury described several scenarios in which mixing services serve legitimate purposes. Mixers are tools that pool a user's transactions with others to obscure the source or destination of funds on a public blockchain. The report identified protecting personal wealth data, maintaining business payment confidentiality, and shielding charitable donation histories as concrete reasons why law-abiding users might seek that kind of privacy. As consumer adoption of digital assets for everyday payments grows, Treasury suggested, demand for spending privacy is likely to increase alongside it.
On-chain data included in the report puts the scale of the policy problem in concrete terms. Since May 2020, more than $1.6 billion in funds traceable to mixing services has passed through crypto cross-chain bridges (protocols that move assets between different blockchain networks), according to the report's own on-chain analysis. Regulators have flagged bridges as a common layering mechanism in money laundering chains. According to Chainalysis's 2024 Crypto Money Laundering Report, bridge protocols received $743.8 million from illicit addresses in 2023 alone, up from $312.2 million the previous year.
The central policy recommendation is new legislation enabling financial institutions and crypto platforms to place a temporary hold on transactions flagged as suspicious. The concept is analogous to fraud holds that traditional banks already apply to questionable wire transfers. The intended effect is a middle-ground option that allows time for investigation without requiring an immediate asset seizure or permanent transaction block. Treasury also drew a distinction between custodial mixers, which are centrally operated services capable of generating compliance records, and non-custodial or decentralized mixing protocols. The report identified the latter as the primary vehicle for large-scale laundering. OFAC cited the figure when sanctioning Tornado Cash in August 2022, estimating that the Lazarus Group had laundered more than $7 billion through the protocol. A Fifth Circuit court ruling in November 2024 later invalidated that sanction, finding that immutable smart contracts lack the ownership, control, and exclusivity characteristics required to qualify as sanctionable "property" under US law.
OFAC delisted Tornado Cash in March 2025. The November 2024 ruling appears, in retrospect, to have contributed to the more calibrated posture Treasury displays in this report, though the department has not stated that connection directly.
Not all of Congress shares Treasury's framing. Representative Sean Casten of Illinois, along with Representatives Foster, Sherman, and Cleaver, introduced the Blockchain Integrity Act, proposing a two-year moratorium on financial institution transactions involving mixer-linked funds while the Treasury, SEC, CFTC, and DOJ conduct an independent study. Civil penalties under the bill would reach up to $100,000 per violation. "Digital asset mixers are key to allowing illicit actors to instantaneously move massive amounts of money around the globe for criminal purposes without detection," Casten said in announcing the bill.
The political backdrop is charged. Testifying before the Senate Banking Committee in February 2026, Treasury Secretary Scott Bessent said: "There seems to be a nihilist group in the industry who prefers no regulation over this very good regulation."
Regional Implications
The report's practical reach extends well beyond the United States. India presents the most direct friction: the Financial Intelligence Unit India (FIU-IND) has already banned mixing services outright and prohibited exchanges from facilitating transactions in privacy-focused coins such as Monero, Zcash, and Dash. Treasury's acknowledgment of legitimate mixer use contradicts that position, though policy observers suggest the custodial versus non-custodial distinction the report introduces could eventually provide Indian regulators with a framework for something more targeted than a blanket prohibition.
Pakistan signed the Virtual Assets Act 2026 just two days before this report, creating the new Pakistan Virtual Assets Regulatory Authority to oversee roughly 40 million estimated crypto users. The law does not address mixers explicitly, but the regulator's broad mandate makes scrutiny of privacy tools inevitable as licensing rules take shape.
For users in Bangladesh, Sri Lanka, and Nepal, where crypto operates in informal or legally ambiguous environments, the Treasury's policy shift carries indirect weight. Global exchanges serving these markets model their compliance frameworks heavily on FATF guidance and, increasingly, on US regulatory signals.
In Africa, the stakes center on transaction speed and economic access. Nigeria, Kenya, and Ghana carry high volumes of crypto-based remittances and peer-to-peer transfers. A hold law, if applied globally by exchanges serving these markets, could introduce delays in cross-border payments that users depend on for economic survival.
South Africa is separately tightening its own AML framework for crypto platforms, with the Financial Intelligence Centre classifying money laundering risk in the sector as high. In February 2026, the country's Budget Speech included draft regulations under the Currency and Exchanges Act, extending that oversight to crypto platforms more formally.
Advocates across both regions arguing against blanket bans have noted that Treasury's formal recognition of legitimate privacy use creates a substantive, government-sourced reference that did not previously exist in US policy documents.
The hold law recommendation now sits with a Congress that contains both the proposal's architects and the sponsors of a competing, far more restrictive bill. How that tension resolves will shape domestic compliance requirements and, given how closely global exchanges track US regulatory signals, the practical experience of crypto users from Karachi to Lagos.