When traders want to purchase crypto using traditional currency, or exchange one cryptocurrency for another, they do so via an exchange.  Coinbase is one of the world’s largest, with over 13 million users.  Over the past few days it has been hit with two class action lawsuits, both in federal district court in California.

The first an insider trading case.   The suit claims Coinbase employees unfairly profited from the December listing of bitcoin cash. The price of bitcoin cash — which spun off from bitcoin in August — shot up almost $1,000 when Coinbase announced on Dec. 19 it would start trading in the digital currency. While the news came as a surprise to most people, the suit says employees knew about the listing ahead of time, as well as anyone they might have told, and those insiders profited unfairly when the price shot up.

The second suit accuses Coinbase of violating California’s Unclaimed Property Law. The suit stem from the exchange allowing its users to send cryptocurrecnies to external email addresses, as opposed to cryptocurrency wallets. The emails would come with a link allowing the recipient to create a Coinbase account and claim their cryptocurrency.  Questions arose in those cases in which the recipients did not open Coinbase accounts.  As alleged in the introduction to the complaint:

Imagine writing a cashier’s check to a friend.  The bank withdraws funds from your account, but your friend never cashes the check. Does the bank get to keep the funds? The law clearly says no. But this is exactly what has happened with cryptocurrencies sent through Coinbase.com.

The Plaintiffs allege that Coinbase kept the unclaimed cryptocurrencies instead of notifying the senders that the funds were never claimed.

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David Zaslowsky is partner in the Litigation Department of Baker McKenzie's New York office. He helps companies solve complex commercial disputes in arbitration and litigation, especially those involving cross-border issues and Section 1782 discovery. David has a degree in computer science and, as a result, has worked on numerous technology-related disputes, including, most recently, those involving blockchain and artificial intelligence. In April 2025, Attorney Intel named David one of the top 25 blockchain lawyers in the country. He is the editor of the Firm's blockchain blog and co-editor of the firm's International Litigation & Arbitration Newsletter. David has been included for a number of years in the Chambers USA Guide and Chambers Global Guide for his expertise in international arbitration. He also sits as an arbitrator and is on the roster of arbitrators for a number of arbitral institutions. David sits on the Board and chairs the governance committee of the New York International Arbitration Center, and is a founding member of the International Arbitration Club of New York. For over 35 years, he has written and spoken often on the subjects of arbitration and international litigation.