The Trump administration has sent emails to U.S. federal government employees, telling them to detail their work accomplishments from the previous week, by Monday night or risk losing their jobs.

The emails came shortly after Elon Musk, the billionaire head of the Trump administration’s Department of Government Efficiency, posted on the social media site X that not responding to the email request would be viewed as a resignation.

It is unclear what legal basis Musk has to terminate federal workers if they fail to respond to his request and what would happen to employees that cannot detail confidential work. However, the American Federation of Government Employees, the largest union representing federal workers, decried the Musk directive as “plainly unlawful” and said it does not believe there is any authority requiring federal workers to respond to the email, which has left them “feeling undervalued and intimidated