The social media firm, bought by billionaire Elon Musk last year, has been thrashing around for ways to make a profit, cutting staff and ramping up its paid-for subscriptions.
Twitter's verified users are mostly those who have paid to receive a blue check mark, though Musk has gifted the check mark to some users and others have it as a legacy from the previous regime.
TweetDeck, launched more than a decade ago, shows messages in columns and its search and posting functions operate differently to the website or the app.
The firm said in a support message on Monday that it was launching a new version of TweetDeck with various new functions.
"In 30 days, users must be Verified to access TweetDeck," the message said.
A series of changes to the way Twitter is run left many TweetDeck users unable to see posts on the weekend.
Twitter bought London-based TweetDeck in 2011, with technology media putting the price tag at $40 million at the time.
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