Possible Clues:

• "Didn't you get the __?"
• It may go around the office
• Yours truly is given second note
• 'You didn't get the ___?'
• Possible cause of your headache needing doctor's note
• Headache for Dilbert
• Note has to be followed by a second note
• Sticky note
• It will remind me to go to the doctor
• It will remind me to go to doctor