US Treasury Recognizes Legitimate Use of Crypto Mixers
The US Treasury has officially recognized that crypto mixers serve legitimate purposes, not just illegal activities. In a March 2026 report to Congress under the GENIUS Act, the Treasury acknowledged that lawful users may use mixers to protect financial privacy on public blockchains. This marks a significant shift in tone from the same agency that sanctioned Tornado Cash in 2022.
Mixers work by pooling crypto from multiple users and redistributing it, making transactions harder to trace. The Treasury report highlights that this privacy feature can benefit users who want to shield details about personal wealth, business payments, or charitable donations. However, the report also emphasizes the need for safeguards like record-keeping to ensure compliance.
The acknowledgment comes amid ongoing concerns about illicit use. The report notes that North Korean-linked thefts accounted for over $2.8 billion in digital asset losses between January 2024 and September 2025, with mixers playing a role in moving stolen funds. Over $1.6 billion in mixer-related deposits were routed through bridges since May 2020.
The Treasury’s stance contrasts sharply with its 2022 actions, when it sanctioned Tornado Cash and later designated certain mixing services as primary money-laundering concerns. However, the legal landscape shifted in March 2025 when a ruling found that smart contracts were not considered property under certain laws, leading to the lifting of Tornado Cash sanctions. FinCEN, the Treasury’s financial crimes unit, also withdrew two proposed rules targeting mixing transactions and unhosted wallets, citing potential negative impacts on legitimate financial activities.
Developers of privacy tools now have a reference point when engaging with lawyers, investors, and regulators. However, the report does not create a safe harbor, as legitimacy is tied to compliance measures like record-keeping. The future will reveal whether these expectations turn into formal guidance and whether FinCEN reintroduces narrower rules.