I thought it famously doesn't, because Musk said it is too expensive?
And the official site also mostly just says, that mainly you have to pay and have a phone number. No sentence that they actually verify you are a living human being.
"Only accounts actively subscribed to Twitter Blue are eligible to receive the blue checkmark.
Our team uses an eligibility criteria on when the checkmark is given to ensure we maintain the integrity of the platform. Your account must meet the following criteria to receive or retain the blue checkmark:
Complete: Your account must have a display name and profile photo
Active use: Your account must be active in the past 30 days to subscribe to Twitter Blue
Security: Your account must be older than 30 days upon subscription and have a confirmed phone number
Non-Deceptive:
Your account must have no recent changes to your profile photo, display name, or username (@handle)
Your account must have no signs of being misleading or deceptive
Your account must have no signs of engaging in platform manipulation and spam
"
https://help.twitter.com/en/managing-your-account/about-twit...