U.S. Treasury Explores Crypto Mixers’ Valid Roles Amid Law Proposals
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The U.S. Treasury Department is shifting its perspective regarding the use of crypto mixers, indicating their potential for legitimate purposes related to financial privacy. This revelation comes as part of a report submitted to Congress under the GENIUS Act.
The 32-page document outlines proposed legislative measures aimed at addressing illicit financial activities, including a new “hold law” that would empower financial institutions to temporarily freeze suspicious digital assets. This move reflects a notable adjustment in the government’s approach to blockchain privacy tools.
The report clarifies that lawful individuals may utilize mixers to safeguard sensitive information concerning their wealth, business transactions, or charitable contributions. This marks a departure from the Treasury’s previous stance, which had seen the imposition of sanctions on Tornado Cash in 2022 and labeled various international mixers as hubs for money laundering in 2023.
Despite the recognition of legitimate uses, the report underscores that criminal elements continue to exploit these mixers. Notably, cybercriminals linked to North Korea have reportedly taken advantage of mixing services, with a staggering $2.8 billion in digital assets stolen between January 2024 and September 2025, including a significant $1.5 billion breach of the Bybit exchange.
In the context of these operations, mixers are frequently employed to obscure transaction trails, often alongside stablecoin swaps and cross-chain bridges. The report contains a deep dive into the mixing phenomenon, revealing that since May 2020, over $37.4 billion has been withdrawn through various bridges, with more than $1.6 billion originating from mixing services. A substantial portion of this activity has been linked to scrutiny over North Korean operations.
Furthermore, the report distinguishes between custodial and non-custodial mixers. Custodial mixers, which are required to register with the Financial Crimes Enforcement Network (FinCEN), can provide identity and behavioral data. In contrast, the Treasury suggests refraining from imposing new regulations on non-custodial mixers, opting instead to highlight the need for careful consideration of privacy and illicit finance risks.
The proposed “hold law” aims to create a safe harbor for financial institutions to freeze assets temporarily while investigating suspicious activities. This measure is expected to aid in managing illicit finance, particularly regarding stablecoins. The Treasury encourages Congress to clarify the roles of different actors within the decentralized finance space to enhance compliance with anti-money laundering and counter-terrorism financing responsibilities.
Additionally, the document suggests expanding Section 311 of the USA PATRIOT Act, empowering the Treasury to impose conditions on certain digital asset transfers beyond traditional banking frameworks. These recommendations resonate with concerns voiced by industry stakeholders, notably Galaxy Research, which warned that legislative measures could significantly expand financial surveillance capabilities.
This report arrives at a pivotal moment in the evolution of cryptocurrency regulation. Notably, following a court’s reversal of sanctions on Tornado Cash, which suggested governmental overreach, the Department of Justice has hinted at a more nuanced approach to prosecuting developers of privacy tools, indicating that the mere act of creating such tools without malicious intent should not be penalized.
The Treasury’s report aims to explore innovative means for detecting illegal activities in the cryptocurrency space, as mandated by the GENIUS Act. It integrates insights gathered from over 220 public comments and consultations with various stakeholders, including financial institutions and law enforcement, to present a comprehensive view of the current landscape.
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