Deere said the contents of the note are just between Trump and Biden, and that it was left for Biden in the Resolute desk in the Oval Office. It's traditional for outgoing presidents to leave a note for their successor.
While Trump is breaking a century and a half tradition of every outgoing president attending the inauguration of their successor, he is keeping with the now 32-year tradition of the departing commander in chief writing a note to the incoming president.
As he left the White House in January 1989 after two terms in office, President Ronald Reagan started the tradition -- leaving a note for his successor, George H.W. Bush, who also happened to be his vice president.
Four years later, despite losing to then-Gov. Bill Clinton of Arkansas in a bitterly contested election, outgoing President Bush left Clinton a note in the Oval Office. The tradition has carried on to this day.
Separately, a White House official tells FOX Business' Blake Berman that outgoing Vice President Mike Pence left his successor, incoming Vice President Kamala Harris, a handwritten note. And Pence, who was head of the Trump adminisration's Coronavirus Task Force, left Biden and Harris a report from the task force.
Outgoing Trump White House press secretary Kayleigh McEnany also tweeted a picture of notes she left for Biden communications staffers.