Tornado Cash Sanctions: From Designation to Delisting

Prepared by the editorial team. Updated August 31, 2026.

Tornado Cash moved through three distinct legal states in under three years, and the difference between them is routinely blurred in ordinary coverage. It was designated by the US Treasury in August 2022, the designation was rejected in part by a federal appeals court in November 2024, and the name was removed from the sanctions list in March 2025. This article sets out what each step did, and just as importantly what none of them did.

What did the 2022 designation actually prohibit?

The August 2022 action added Tornado Cash to the Specially Designated Nationals list, which generally bars US persons from transacting with a designated party and requires blocking of property in US control. In practice it meant US persons could not lawfully deal with the listed addresses, and intermediaries moved quickly to restrict access.

The SDN list is the operative instrument of most US financial sanctions. Being placed on it is not a criminal conviction and involves no trial. It is an executive action by the Office of Foreign Assets Control, drawing its force from statutes authorizing the President to block property in which a foreign interest exists. That statutory framing became the central issue later.

What made this designation unusual was its target. Previous crypto-related designations had named people, companies or specific wallets tied to identifiable operators. Here the listing swept in a set of autonomous smart contracts on Ethereum that no company controlled and no party could alter. Treasury pointed to substantial use by state-linked actors, including the North Korean Lazarus Group, as justification for treating the tool itself as the object of the action.

The immediate effects were felt off-chain rather than on-chain. Code repositories were taken down, a front-end interface went offline, and financial services restricted addresses connected to the pools, while the contracts themselves continued to function exactly as before.

Why did an appeals court rule the designation went too far?

In November 2024 the Fifth Circuit held in Van Loon v. Department of the Treasury that the immutable smart contracts could not lawfully be designated, because they were not property in which anyone held an interest. The statute permits blocking property, and the court concluded that an unownable, unchangeable line of code does not fit that definition.

The reasoning turned on ordinary legal meaning rather than on any judgment about privacy or crypto policy. Property, in the court’s reading, implies something capable of being owned, and ownership implies the ability to exclude others or to dispose of the thing. An immutable contract that anyone can call and nobody can modify or switch off satisfies neither condition. The court declined to stretch the statutory term to cover it.

Two limits on the ruling are widely overlooked. It addressed the immutable contracts specifically, not every component associated with the project, and it decided a question about the scope of executive sanctions authority rather than whether the underlying activity was harmless. A finding that an agency exceeded a statute says nothing about what a different statute could reach.

What changed when Treasury removed the designation in March 2025?

In March 2025 the Treasury Department removed Tornado Cash from the SDN list, meaning the specific prohibition attached to that listing no longer applies. As of this writing the name is not designated. That is a narrow factual statement about one list, and it is the point most often overstated in secondary coverage.

A delisting updates the operative list to match the legal position. It is not an exoneration, a policy endorsement, or a statement that the tool is now regarded as low risk. Treasury retains authority to designate parties under other criteria, and criminal statutes on money transmission, money laundering and sanctions evasion operate independently of any list.

The practical result resists a one-word summary. Interacting with the contracts no longer runs into a designation prohibition on that name, yet financial institutions continue to treat mixer-associated funds as elevated risk under their own anti-money-laundering programs, because those programs are driven by risk assessment rather than list membership. Both statements are true at once, and readers encountering only one tend to draw the wrong conclusion.

How can you check whether something is currently on the SDN list?

You check by going to the official sanctions list published by the issuing government, searching the exact identifier rather than a brand name, reading the action notice behind any change, recording the date of your check, and confirming scope with a qualified adviser. The procedure below is a research and compliance method, not a guide to using any protocol.

Step 1: Start from the primary government source

Begin at the sanctions list published by the issuing government body itself rather than a news article or an aggregator, because only the official list is authoritative and secondary sources often lag behind changes. Aggregators and commentary sites can be weeks or years out of date, and their update history is rarely visible to the reader.

Step 2: Search the exact identifier, not just the brand name

Search the specific identifier you care about, such as a precise entity name or an address string, because a brand name can appear in commentary while the underlying listed identifiers differ or have changed. A project name in a headline is not the same object as the entries that actually appear on a list.

Step 3: Read the action notice behind any change

Locate the official action notice or Federal Register entry behind any addition or removal, since the notice states the legal basis and scope of the change rather than the summary a headline provides. The scope language is usually where a reader discovers that a change is narrower than reported.

Step 4: Record the date and result of your check

Write down the date you checked and what the list showed, because sanctions status changes over time and a compliance record needs to show what was true at the moment a decision was made. A dated record is what distinguishes a defensible process from an after-the-fact assertion.

Step 5: Confirm scope with a qualified adviser

Ask a qualified sanctions or legal professional how the result applies to your jurisdiction and your role, because delisting of one name does not resolve every obligation that may attach to related conduct. List status is one input into a legal analysis rather than the analysis itself.

Does delisting mean the conduct around a mixer is now lawful?

No. Delisting removes one specific prohibition tied to one list entry. It has no effect on criminal statutes covering money laundering, unlicensed money transmission or sanctions evasion, and it does not alter the obligations of regulated firms. Conduct that was unlawful for independent reasons remains unlawful after a delisting.

The distinction is between a status and a set of rules. A designation is a status attached to a name, and removing it changes that status only. The criminal code operates on conduct instead, asking what a person did, what they knew and what they intended. Those questions are unaffected by whether a name appears on an administrative list, which is why the Roman Storm prosecution in New York continued after the delisting rather than dissolving with it.

Jurisdiction adds a further layer. US sanctions policy does not govern the Netherlands, where a separate prosecution proceeded on its own national law, nor any other country’s rules on money laundering. A reader outside the United States who treats the delisting as resolving a local question has drawn a conclusion the event cannot support.

Common misreadings of the delisting

Several confident claims circulated after March 2025 that the record does not support. The table separates what the event established from what it did not, as a reference for readers encountering conflicting summaries. It describes the legal position in general terms and is not advice for any particular situation.

Common claim	What the record actually shows
The courts declared mixing legal	Van Loon decided a statutory question about sanctions authority, not the legality of any conduct
The prosecution collapsed after delisting	The criminal case in New York continued and a retrial is scheduled for April 2027
Exchanges no longer flag mixer-linked funds	Risk-based AML programs operate independently of list membership and continue to apply
The matter is settled worldwide	A separate Dutch prosecution proceeded under national law and the US position does not govern it
Delisting cannot be reversed	Removal reflects one decision on one record; designation authority remains available

The pattern in each row is the same. An event with a narrow legal scope gets reported as a broad conclusion, and the broad version travels further than the correction.

Frequently asked questions

Did the delisting return any funds that had been blocked?

Delisting removes forward-looking prohibitions attached to a designated name, but it does not by itself unwind actions already taken by third parties such as exchanges or service providers. Anyone with a specific blocked-asset question should raise it with counsel rather than assuming the removal reversed prior steps automatically.

Does an OFAC designation apply to people outside the United States?

US sanctions primarily bind US persons and transactions with a US nexus, but the practical reach is wider because global banks and exchanges apply US rules to protect their dollar access. Non-US readers should treat their own national sanctions regime as the governing one and check it separately.

Can a name be added back to the SDN list after being removed?

Yes. Removal reflects a decision made on a particular record at a particular time and carries no guarantee about the future. This is one reason compliance procedures call for checking the current list at the moment of a decision rather than relying on a previously recorded result.

Why do some articles still describe Tornado Cash as sanctioned?

Much of the widely circulated commentary was written between 2022 and early 2025 and was accurate when published. Undated or unrevised articles continue to rank in search results, which is why a status claim should always be confirmed against the current official list rather than a secondary source.