Followers of that account were also automatically added as followers to the newly created @POTUS account for the Trump administration.
The Biden team says the new plan is for @Transition46 to become @WhiteHouse. Followers of @JoeBiden and @WhiteHouse will be encouraged to follow the new account with a one-time front page notification, but will not be migrated over automatically.
Twitter has been working on the transition for the platform widely used by Mr Trump since the election results were finalised, and has indicated that as a private citizen Mr Trump may not have as much leeway in stretching the rules for newsworthy comments.
While not as widely followed as Mr Trump’s personal account, @POTUS has some 33 million followers and @WhiteHouse 26 million.
The transfer will affect other institutional accounts such as @VP, @FLOTUS, @PressSec, @Cabinet, and @LaCasaBlanca, according to Twitter.
Last month, Twitter indicated any special treatment that Mr Trump has enjoyed ends with his presidency.
“Twitter’s approach to world leaders, candidates and public officials is based on the principle that people should be able to choose to see what their leaders are saying with clear context,” the San Francisco company said.
“This policy framework applies to current world leaders and candidates for office, and not private citizens when they no longer hold these positions.”