A United States federal judge ruled that Binance cannot force a group of US customers to arbitrate claims over losses on crypto tokens they bought on its global platform before Feb. 20, 2019, keeping a major class action in open court.
The decision on Thursday by District Judge Andrew Carter Jr. in the Southern District of New York held that those claims were not bound by Binance.com’s 2019 arbitration clause because users lacked sufficient notice when the company unilaterally shifted its terms of use away from the 2017 version, which contained no arbitration or class action waiver provisions.
According to the judge, Binance relied on a general change‑of‑terms clause and the posting of updated 2019 terms on its website, and there was no evidence that the exchange provided any individual notice or formally “announced” the new arbitration provision to users.
Carter found that Binance’s “new world” rhetoric about operating in a decentralized manner did not change the basic contract law analysis for internet‑based agreements.
Williams vs. Binance. Source: CourtListener
He concluded that the 2019 arbitration clause could not be applied retroactively to claims that arose before its Feb. 20 effective date, because the contract never clearly said it would cover earlier conduct.
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Carter also held that a purported US class action waiver embedded in a section heading of the 2019 terms was unenforceable in federal court because the contract never actually sets out the terms of any such waiver and had to be interpreted narrowly against Binance as the drafter.
Binance says post‑2019 claims already dismissed
The case, Williams v. Binance, is a proposed class action brought by five US investors from California, Nevada and Texas who claim that Binance and founder Changpeng Zhao (CZ) illegally sold unregistered securities on Binance.com and failed to register as a broker‑dealer.
The case was previously dismissed in 2022 before the Second Circuit revived the investors’ claims in 2024, sending the dispute back to Carter’s court.
In a statement to Cointelegraph, a Binance spokesperson said that “in response to our motion on this issue plaintiffs voluntarily and correctly dismissed all claims that accrued on or after Feb. 20, 2019.” They added that Binance would “vigorously defend the limited claims that remain in this meritless case.”
The remaining claims will now proceed in a federal US court rather than private arbitration in Singapore, as judges, rather than arbitrators, assess whether crypto platforms can rely on unilaterally updated online terms to limit investor lawsuits.
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