To keep their blue checkmark on Twitter, individuals and organisations must sign up for Twitter Blue, the announcement said.
This means only users who are paying for Twitter Blue, costing $8 (Rs 658) per month via web and $11 (Rs 904) per month, through in-app payment, will have verified blue check-marks.
Legacy verified accounts on Twitter are those that had been verified through the previous system, which verified notable users like politicians, celebrities and journalists.