Treasury Kills Crypto 'Unhosted Wallet' and Mixer Surveillance Rules

FinCEN has withdrawn two long-pending regulatory proposals: a 2020 notice that would have forced banks and money-services businesses to record and report transactions with self-custodial (unhosted) wallets, and a 2023 plan to designate international crypto mixing as a "primary money laundering concern." The agency said it will take no further action on the unhosted wallet rule and cited concerns that the mixer proposal's broad definition could deter legitimate uses of crypto.

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Treasury Kills Crypto 'Unhosted Wallet' and Mixer Surveillance Rules

Why It Matters

These withdrawals remove two of the most controversial surveillance-focused crypto rule proposals from the Treasury rulemaking pipeline, narrowing an immediate regulatory threat to self-custody and mixing services; however, FinCEN and Treasury retain statutory authority to revisit similar measures in the future.

Key Facts

Agency: Financial Crimes Enforcement Network (FinCEN), Treasury Department
Withdrawn proposals: 2020 'unhosted wallet' NPRM and 2023 international crypto mixing designation
Unhosted wallet proposal details: Would have required recordkeeping for self-custody wallet transactions above $3,000 and reports for transactions over $10,000
Mixer proposal details: Would have designated international crypto mixing as a 'primary money laundering concern' and required reporting of wallet addresses, transaction hashes, and IP addresses tied to suspected mixing
Reason cited for mixer withdrawal: Commenters warned the rule's expansive definition could chill legitimate activity; White House digital asset report referenced support for private lawful transactions on public blockchains (July 2025)

The Treasury Department's Financial Crimes Enforcement Network has formally withdrawn two controversial crypto-focused proposals after years of debate. Notices filed Monday and scheduled for publication in the Federal Register on Tuesday announce that FinCEN will take no further action on its December 2020 notice of proposed rulemaking addressing 'unhosted' or self-custodial wallets. That earlier proposal would have extended Bank Secrecy Act-style requirements to personal wallets by obliging banks and money services businesses to keep records on transactions with such wallets above $3,000 and to file reports on transactions over $10,000. FinCEN also scrapped a separate 2023 proposal that sought to label international crypto mixing as a class of transactions posing a 'primary money laundering concern' under the USA PATRIOT Act. The mixing proposal would have required financial institutions to report identifiers such as wallet addresses, transaction hashes, and IP addresses connected to suspected mixing activity. In its withdrawal notice, FinCEN said commenters raised concerns that an expansive definition of mixing could suppress lawful uses of crypto. Both withdrawals reference the White House's July 2025 digital asset report; the mixer notice quotes the administration's statement supporting lawful users' ability to privately transact on public blockchains. FinCEN added it will continue to monitor mixers for illicit finance and left open the possibility of future action. The agency's move closes two rulemaking tracks that had drawn persistent opposition from privacy and crypto policy advocates. Civil-society and industry groups responded quickly. Coin Center, which had campaigned against both rules, hailed the withdrawals while warning the Treasury retains the statutory authority to propose similar regulations later. The episode follows other regulatory pressure points over self-custody: the Consumer Financial Protection Bureau floated an interpretive rule early last year that would have brought certain wallets under consumer payment law, which also prompted pushback from stakeholders.