Twitter intends to begin charging $20 per month for verification.

Elon Musk will fire those who are working on it if they don't finish it by the deadline.

According to persons familiar with the subject and internal email viewed by The Verge, the instruction is to convert Twitter Blue, the company's optional $4.99 per month subscription that unlocks more services, into a more expensive subscription that also validates users. The new Twitter Blue subscription will cost $19.99, as of right now, according to Twitter. The current proposal would give verified users 90 days to subscribe or lose their blue checkmark. Workers on the project were informed on Sunday that they have until November 7th to launch the feature or they risk being fired.

Musk has acted rapidly to make changes at Twitter, modifying the homepage for logged-out users just three days after becoming "Chief Twit." He's contemplating mass layoffs of middle management and engineers who haven't recently added to the code base with the assistance of Tesla engineers he's hired into Twitter as consultants. Managers have already started compiling names of staff members to lay off, and the cuts are anticipated to start this week. Since Musk assumed leadership on Thursday evening, those assigned to carry out his ideas have worked over the weekend and into the wee hours.

The Twitter Blue membership became publicly available over a year ago as a way to read articles from some publishers without ads and make other changes to the app, such changing the color of the app's icon on the home screen. Advertising continued to make up the vast bulk of Twitter's revenue in the few quarters after that launch that it declared results as a publicly traded company. Musk wants subscriptions to increase to account for half of the business's total income.