FinCEN Withdraws Proposed Rules on Crypto Mixers and Self-Hosted Wallets

The U.S. Financial Crimes Enforcement Network (FinCEN) is withdrawing two proposed rules that would have expanded reporting and verification requirements for certain cryptocurrency transactions, including those involving crypto mixers and self-hosted wallets.

The Treasury Department bureau announced the withdrawals on October 5, citing comments received on the proposals and the Trump administration’s broader effort to ensure digital-asset regulations are “fit-for-purpose.”

One proposal, introduced in 2023, targeted international convertible virtual currency (CVC) mixing. The other, first proposed in 2020, would have required financial institutions to collect and report additional information about transactions involving unhosted or self-hosted wallets.

Because neither proposal had become a final rule, their withdrawal does not eliminate any existing compliance obligations for banks or money-services businesses. Instead, it closes the rulemaking processes surrounding the two proposals.

FinCEN Drops Crypto Mixer Rule

The 2023 proposal sought to designate international CVC mixing as a class of transactions of primary money-laundering concern under Section 311 of the USA PATRIOT Act. It was FinCEN’s first use of that authority against an entire class of transactions rather than a specific institution or jurisdiction.

The proposed framework would have required covered financial institutions to report transactions they knew, suspected or had reason to suspect involved CVC mixing. The information contemplated under the proposal included details that could help authorities trace the transactions and identify the wallets involved.

FinCEN's original definition of mixing was broad. It covered arrangements designed to obscure the source, destination or amount of virtual currency, including techniques involving the pooling and splitting of funds and the use of single-use addresses. The proposal also addressed mechanisms that could delay transactions in ways that make deposits and withdrawals harder to connect through timing.

The agency acknowledged in its original proposal that mixing can have legitimate privacy uses. However, it argued that the technology also creates significant money-laundering risks because it can make the flow of funds more difficult for financial institutions and law enforcement to trace.

The withdrawal now reflects concerns raised during the public comment process that such a broad framework could capture legitimate activity and create substantial reporting burdens for regulated financial institutions.

At the same time, FinCEN said it continues to view crypto mixers as a potential channel for illicit finance and will continue monitoring their use.

Privacy Concerns Shape the Policy Reversal

The decision comes after the administration's 2025 working group on digital-asset markets highlighted the potential legitimate uses of crypto mixing, particularly for people seeking greater financial privacy when using public blockchain networks.

That report called for further consideration of how the government should approach crypto mixing rather than automatically applying a broad regulatory framework.

The issue has also drawn criticism from the digital-asset industry. Coin Center, which opposed both proposals, argued that FinCEN's definition of mixing could encompass ordinary privacy-enhancing techniques used by cryptocurrency users.

The debate reflects a difficult regulatory balance: authorities want to prevent criminals from using privacy tools to hide illicit funds, while avoiding rules that effectively treat legitimate privacy-preserving activity as inherently suspicious.

Self-Hosted Wallet Proposal Also Withdrawn

FinCEN is also abandoning a separate proposal first introduced in December 2020 concerning transactions involving unhosted, or self-hosted, wallets.

Under that proposal, banks and money-services businesses would have been required to verify customers' identities and retain records for certain transactions involving self-hosted wallets or wallets hosted in jurisdictions identified by FinCEN. The requirements would have applied above specified thresholds.

The proposal also contemplated reporting transactions exceeding $10,000, including groups of transactions that collectively surpassed that amount within a 24-hour period. FinCEN later reopened the comment period in January 2021 after receiving thousands of submissions.

The agency said the withdrawal forms part of the administration's ongoing effort to reassess digital-asset regulations and ensure they are appropriately tailored to their objectives.

FinCEN said it will take no further action on that particular proposal.

A Shift Away From Broad Privacy Rules?

The withdrawals mark a notable change from the regulatory approach reflected in the two proposals.

The 2023 mixer proposal was built around the idea that an entire category of transactions could warrant enhanced scrutiny because of its potential use in money laundering. The self-hosted wallet proposal similarly sought to impose additional identification, recordkeeping and reporting requirements around transactions that fell outside traditional custodial infrastructure.

Neither approach ultimately became a final rule.

The withdrawals therefore leave open the question of how U.S. authorities will address the illicit-finance risks associated with crypto privacy tools going forward. FinCEN has made clear that it continues to monitor mixing activity and other digital-asset channels for signs of money laundering and other illicit finance.

For the crypto industry, however, the decisions signal that future rules may place greater emphasis on targeted measures rather than imposing broad obligations across privacy technologies and self-hosted wallets.

That distinction could become increasingly important as regulators attempt to address illicit activity without treating privacy itself as a compliance risk.