WASHINGTON -- As one White House administration transfers power to another, it's customary for the outgoing president to leave a message for the incoming commander in chief.
The letters are handwritten with the official White House seal and dated for the day of the new president's inauguration.
As Donald Trump prepares to settle into the Oval Office, ABC News is taking a look at the personal notes of previous presidents.
ABC News obtained the letters from Bill Clinton to George W. Bush and from Bush to Barack Obama.
Both letters feature words of wisdom and encouragement to the incoming president.
The following is the letter Clinton wrote to Bush:
The following is the letter Bush wrote to Obama: