It can be tough remembering to take a note to school if you take a day off, but one girl in America couldn't forget hers because Barack Obama wrote it!
Kennedy Corpus, 10, missed school to hear President Obama speak, and needed a note to explain her absence.
When Kennedy's dad told Mr Obama about her day off while asking a question, the president offered to write a note.
Everyone thought he was joking, but then Mr Obama wrote a note to Kennedy's teacher and handed it over.
The note read: "To Kennedy's teacher: Please excuse Kennedy's absence. She's with me. Barack Obama."
He then stepped off the stage to give the note to Kennedy by hand, who said: "I thought he was joking until he started walking down.
Best thing ever
"It was like the best thing ever," she added.
But her teacher will have to settle for a copy of the original as Kennedy said she's planning on framing the real thing, along with her ticket to the event!