Twitter, after laying off roughly half the company on Friday following Elon Musk’s $44 billion acquisition, is now reaching out to dozens of employees who lost their jobs and asking them to return.

Some of those who are being asked to return were laid off by mistake, according to two people familiar with the moves. Others were let go before management realized that their work and experience may be necessary to build the new features Musk envisions, the people said, asking not to be identified discussing private information.

Twitter cut close to 3,700 people last week via email as a way to trim costs following Musk’s acquisition, which closed in late October. Many employees learned they lost their job after their access to companywide systems, like email and Slack, was suddenly suspended. The requests for employees to return demonstrate how rushed and chaotic the process was.

A Twitter spokesperson did not reply to a request for comment. Twitter’s plan to hire back workers was previously reported by Platformer.

"Regarding Twitter’s reduction in force, unfortunately there is no choice when the company is losing over $4M/day,” Musk tweeted on Friday.

Twitter has close to 3,700 employees remaining, according to people familiar with the matter. Musk is pushing those who remain at the company to move quickly in shipping new features, and in some cases employees have even slept at the office to meet new deadlines.

Over the weekend, Twitter rolled out a new Twitter Blue subscription plan, offering a verification check mark to any user who pays $8 a month. The company also said it will soon be launching other features, including half the ads, the ability to post longer videos and get priority ranking in replies, mentions and searches.

Musk said on Sunday that Twitter users engaging in impersonation without clearly specifying it as a "parody" will be permanently suspended without a warning.

In a separate tweet, Musk said Twitter previously issued a warning before suspension, but as Twitter is rolling out widespread verification, there will be no warning as well as "no exceptions."

"This will be clearly identified as a condition for signing up to Twitter Blue," Musk said, adding that any name change at all will cause temporary loss of a verified checkmark.

Twitter on Saturday updated its app in Apple's App Store to begin charging $8 for sought-after blue check verification marks, in Elon Musk's first major revision of the social media platform.

Tesla boss Musk, who also will serve as chief executive of Twitter, last month said Twitter will be forming a content moderation council with "widely diverse viewpoints."

"No major content decisions or account reinstatements will happen before that council convenes," he added.

On the topic of banned accounts, Musk last week said they will not be allowed back onto Twitter until the social media platform has "a clear process for doing so."

Creating such a process would take at least a few more weeks, Musk had tweeted, giving more clarity about the potential return of Twitter's most famous banned user, former U.S. President Donald Trump. The new timeline implies Trump will not return in time for the midterm elections on Nov. 8.

Earlier on Sunday, The New York Times reported that Twitter is delaying the rollout of verification check marks to subscribers of its new service until after Tuesday's midterm elections.