Coinbase, Blockchain Association challenge FinCEN’s proposed mixer crackdown 

FinCEN’s proposed rule could stigmatize legitimate crypto activity and drive illicit transactions abroad, Blockchain Association says

article-image

Blockchain Association CEO Kristin Smith | DAS 2022 for Blockworks

share

Several industry players have objected to a federal agency’s attempt to crack down on crypto mixing services, with one advocacy group calling the proposal “fundamentally flawed.”

The US Treasury Department’s Financial Crimes Enforcement Network (FinCEN) proposed in October to classify what it calls convertible virtual currency mixing, or CVC mixing, as “a class of transactions of primary money laundering concern.”

The proposal is FinCEN’s first-ever use of its authority to target a transactions class as such.

Read more: FinCEN seeks tighter controls on crypto mixing services

Mixing is a process that blends different crypto transactions to obscure the original source — making it more difficult to trace specific transactions.

FinCEN director Andrea Gacki said in an October statement that crypto mixing “allows players in the ransomware ecosystem, rogue state actors and other criminals to fund their unlawful activities and obfuscate the flow of ill-gotten gains.”

Marisa Coppel, head of legal at Blockchain Association, said in a statement that FinCEN’s proposal is “far too broad in scope and application.”

In a Jan. 22 letter responding to the proposal, the Blockchain Association argued that FinCEN’s failure to consider the many legitimate uses of crypto mixing makes it “makes it impossible for the agency to rationally conclude that the class is of primary money laundering concern.”

“CVC mixing protocols help law-abiding individuals achieve on the otherwise public blockchain the privacy typical of transactions in the traditional banking system,” the group wrote. “There is nothing inherently suspicious about desiring the same degree of privacy available for traditional financial transactions.”

FinCEN’s decision to impose reporting requirements on CVC mixing transactions “will stigmatize broad swathes of legitimate digital asset activity, impose significant costs on the digital asset industry and drive illicit digital asset transactions abroad,” Blockchain Association added.

Coinbase also challenged the proposal in a Jan. 22 letter. The crypto exchange noted that regulated virtual asset service providers (VASPs) are already required to file suspicious activity reports on illicit mixing activity. 

“The NPRM fails to explain why these existing requirements are inadequate to FinCEN’s purposes,” Coinbase wrote.  

The company added in the letter that the FinCEN proposal does not include any monetary threshold for record-keeping and reporting obligations — leading to “bulk reporting of data of little help to law enforcement.”

FinCEN could not immediately be reached. 

The FinCEN proposal comes after the US Treasury Department added decentralized cryptocurrency mixing service Tornado Cash to its sanctions list in August 2022. A year later, the company’s co-founders, Roman Semenov and Roman Storm, were charged with US federal money laundering and sanctions violations.

Read more: Tornado Cash plaintiffs seek appeals after federal court losses

Coinbase is no stranger to challenging federal agencies amid a broader crackdown on the crypto space. 

The publicly traded crypto company remains in a legal battle with the US Securities and Exchange Commission after the regulator last year sued Coinbase for allegedly operating as an unregistered exchange — claims the company has denied.

“This [proposal] comes at a time of enormous opportunity for the United States to lead the world in digital asset innovation,” Coinbase wrote in its latest letter to FinCEN. “But this opportunity depends in significant part on US regulators, like FinCEN, creating a regulatory landscape that fosters the growth of compliant companies while holding accountable those that fail to meet their obligations.”


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Upcoming Events

Old Billingsgate

Mon - Wed, October 13 - 15, 2025

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

Industry City | Brooklyn, NY

TUES - THURS, JUNE 24 - 26, 2025

Permissionless IV serves as the definitive gathering for crypto’s technical founders, developers, and builders to come together and create the future.If you’re ready to shape the future of crypto, Permissionless IV is where it happens.

Brooklyn, NY

SUN - MON, JUN. 22 - 23, 2025

Blockworks and Cracked Labs are teaming up for the third installment of the Permissionless Hackathon, happening June 22–23, 2025 in Brooklyn, NY. This is a 36-hour IRL builder sprint where developers, designers, and creatives ship real projects solving real problems across […]

recent research

Research Report Templates.png

Research

Despite ending its points program, Hyperliquid has maintained a dominant market position with 77% of perpetuals DEX volumes, though overall volume has decreased from early 2025. It is the only DEX that has been able to compete with CEX volumes. Hyperliquid's success stems primarily from rapid, relevant token listings and superior UX for users and market makers, particularly its API - which is how market makers interact with the protocol. The controversial oracle price override during the JELLY incident exposed risks in the Hyperliquid Liquidity Pool (HLP), though the team has since implemented risk management adjustments. The HyperEVM is currently underoptimized and lacks necessary precompiles, but represents an important strategic expansion to enable asset issuance and DeFi composability.

/