Former Twitter employees are scoring early victories in legal challenges to Elon Musk’s mass layoffs when he bought the company in 2022.

Four ex-Twitter workers have prevailed in a recent series of closed-door arbitration proceedings over claims they were illegally denied severance, according to a memo seen by Bloomberg News. More than two years ago, Musk asked Twitter employees in an email with the subject line “A Fork in the Road” to either commit to an “extremely hardcore” work environment or leave the company.

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At Twitter, now known as X, the four workers argued successfully that although they didn’t respond to the email, they did not resign and were instead terminated, meaning they were entitled to severance promised by the company before Musk bought it.The victories for the four employees haven’t previously been reported.

The similar emails sent to federal workers are now the subject of several lawsuits. Musk and representatives of X didn’t respond to requests for comment.