New York Sued KuCoin and Put Ether’s Legal Status Before a Court

New York Attorney General Letitia James filed a civil enforcement case against cryptocurrency exchange KuCoin on March 9, 2023, alleging that it let New Yorkers trade digital assets without registering as a securities or commodities broker-dealer. The filing also put ether at the center of a larger jurisdictional dispute: the state argued in court that ETH was a security as well as a commodity under New York law.

The case was consequential beyond one offshore trading platform. Ether was the native asset of the second-largest blockchain economy, and the petition brought a regulator’s security theory about ETH into a live court proceeding. But the distinction was essential on March 9: the attorney general had made an allegation, not obtained a judicial ruling that classified ether nationally.

What New York alleged

The proceeding named Mek Global Limited and PhoenixFin PTE Ltd., which the state said operated KuCoin. According to the attorney general’s supporting memorandum, KuCoin offered, sold and purchased ETH, LUNA and UST for New York users while lacking required state registration. The state also alleged that KuCoin Earn, a lending and staking product that pooled customers’ crypto assets to produce income for KuCoin and participants, was an unregistered security.

The attorney general said investigators created an account from a New York-based internet address, bought and sold tokens for fees, and deposited tokens into KuCoin Earn. The filing further alleged that KuCoin improperly represented itself as an exchange because it was neither registered with the Securities and Exchange Commission as a national securities exchange nor appropriately designated by the Commodity Futures Trading Commission. It also said KuCoin failed to comply with a state subpoena seeking information about its New York activity.

These were the petitioner’s claims and investigative representations. KuCoin had not been found liable on March 9, and the supporting memorandum was advocacy submitted by the attorney general, not neutral fact-finding by the court.

Why ether was in the case

New York’s theory treated ETH as an investment asset whose value depended substantially on the work of developers and the Ethereum Foundation. The memorandum pointed to the 2014 token sale as financing for network development, the influence of Vitalik Buterin and the foundation, promotion of ETH as an investment, and Ethereum’s 2022 transition from proof-of-work to proof-of-stake.

The state argued that proof-of-stake gave ETH holders profit potential through staking rewards and strengthened the connection between ownership and expected returns. It invoked both New York’s Waldstein line of cases and the federal Howey investment-contract test.

That analysis was not the only regulatory view in circulation. Federal officials were publicly divided over the treatment of major crypto assets. The New York petition did not settle that federal boundary, bind another regulator or turn every ETH transaction into a securities transaction by declaration. Its importance was procedural and institutional: a broad security theory had moved from public debate into pleaded claims seeking judicial relief.

What the state wanted

The attorney general asked the New York Supreme Court for a permanent injunction, an accounting of fees received from New York investors, restitution, disgorgement and costs. The requested injunction included preventing KuCoin from serving New York and requiring IP-address and GPS-based geoblocking of its website, app and services.

For exchanges, the action showed that being organized outside the United States did not eliminate state-level exposure when investigators could access a platform from New York. For Ethereum participants, it created legal uncertainty rather than a final classification. The immediate event-day record established the lawsuit, its allegations and the relief requested; it did not establish liability, customer losses, a final remedy or a nationwide rule for ether.

No market-price claim is made here. Crypto trading continued across venues and time zones on March 9, while Silvergate’s separately announced March 8 wind-down also weighed on the sector, making any attempt to attribute an ETH move solely to the KuCoin filing unreliable without a defined venue and timestamp.