Karsten Wenzlaff, Advisor
August 26th, 2025
Karsten Wenzlaff is a Crowdfunding and Fintech Expert from Germany. He is Secretary-General of Digit[...]
Treasury Reopens Crypto Mixer Privacy Debate
Mar 9, 2026 | NCFA Fintech Market Insight | Digital Assets And Policy And Regulation
Image: Unsplash/J K
Crypto Mixers Sit Between Financial Privacy And AML Risk
On March 9 2026, the U.S. Treasury released a report to Congress on innovative technologies to counter illicit finance involving digital assets under the GENIUS Act. Treasury says successful monthly transactions on public blockchains reached 3.8 billion in early 2025, up 96% year over year. Treasury also reviewed more than 220 public comments while preparing the report. Against that backdrop, the report goes on the record to say crypto mixers can support laundering and sanctions evasion, but they can also serve legitimate privacy needs on public blockchains.
Treasury doesn't overlook the enforcement case against cyrpto mixers, saying criminals commonly use mixing, bridging, and swapping to obscure transaction trails and frustrate investigations. Treasury links these techniques to ransomware groups, darknet markets, sanctions evasion schemes, and DPRK cyber actors. The scale of harm remains large.
See: Tornado Cash virtual currency mixer sanctioned by the U.S.
Victims reported more than $9 billion in digital asset related fraud to the FBI in 2024, including $5.8 billion tied to digital asset investment schemes, up 47% from the prior year. Treasury also says DPRK cybercriminals stole at least $2.8 billion in digital assets from January 2024 to September 2025, including a $1.5 billion theft in February 2025 that Treasury describes as the largest digital asset heist to date.
Privacy Enters The Policy Record
The report states that lawful users may use mixers to enable financial privacy when transacting through public blockchains. Treasury gives practical examples. Individuals may want to protect sensitive information such as personal wealth, business payments, charitable donations, or consumer spending patterns from appearing on public ledgers.
That statement changes the tone of the policy debate. The question is no longer whether mixers exist only for criminals. The policy challenge is whether privacy tools can operate with sufficient accountability, recordkeeping, and supervision inside the financial system.
Treasury also notes that custodial mixers that accept and transmit value must register with FinCEN as money services businesses, maintain records, and file suspicious activity reports. When compliant, these services can provide customer identities, off chain transaction data, and behavioural information to regulators or law enforcement.
Treasury Says Stablecoins Are Inside The Laundering Chain
Treasury also describes how mixers interact with broader digital asset infrastructure. Stablecoins frequently appear in laundering chains when illicit actors transfer assets across blockchains or prepare to convert digital assets into fiat.
Read: FinCEN proposes new rules targeting crypto mixers
Since May 2020, Treasury says more than $37.4 billion in withdrawals from over 50 bridges were denominated in the two largest stablecoins by market capitalization. During the same period those bridges received about $1.6 billion in deposits originating from mixing services. Treasury says more than $900 million of those deposits flowed into one specific bridge that faced scrutiny for DPRK linked laundering (North Korea state-sponsored).
The Compliance Stack Needed
A large part of the report focuses on the technologies Treasury believes financial institutions should use to strengthen anti money laundering and sanctions compliance programs. Treasury highlights four priority tools: artificial intelligence, digital identity, blockchain analytics, and application programming interfaces.
Treasury cites FinCEN analysis showing about 1.6 million identity related BSA reports in 2021, equal to 42% of reports filed that year and tied to $212 billion in suspicious activity. Treasury says AI can help institutions analyze large datasets and reduce false positives, digital identity systems can strengthen customer onboarding and fraud detection, blockchain analytics tools can trace wallet activity across networks, and APIs can improve secure monitoring and information sharing.
Why It Matters
The next evolution of digital asset infrastructure will likely reward firms at the forefront of regulatory accountability that can distinguish lawful privacy from criminal abuse, strengthen identity and monitoring controls, and provide institutions with faster and more accurate compliance tools.
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