Reverse engineer Jane Manchun Wong has revealed via the micro-blogging platform that she discovered a "request verification" in Twitter's app in the "personal information" section of its settings.
Twitter has acknowledged Wong's message but has refused to elaborate on its plans.
The platform's help page also confirms the site is "not accepting any new requests at this time".
Twitter's blue tick was initially introduced to verify an account as being authentic.
But in more recent times, the company has acknowledged that there's been some confusion over the purpose of the badge and its meaning.
Meanwhile, Twitter recently hid a controversial tweet by US President Donald Trump, saying the post violated its rules about glorifying violence.
Speaking in reference to the recent riots in the US, Trump warned: "When the looting starts, the shooting starts."
But the message was hidden behind a warning that read: "Twitter has determined that it may be in the public's interest for the Tweet to remain accessible."
By contrast, Facebook decided against censoring the post.
Facebook boss Mark Zuckerberg subsequently admitted: "How to handle this post from the president has been very tough.
"It's been something that I've been struggling with basically all day, ever since I woke up ... This has been personally pretty wrenching for me."