Related Clues:

• Note concealed by turning over welcome mat
• Pad jottings
• Note written as a reminder
• Request for a face-to-face
• Ominous request on a graded paper
• Note from a 6-Down that might give you jitters
• Note below F, perhaps?
• Teacher's note that makes one go [gulp]
• Short note or message
• Brief summons from a boss
• Office notice
• 'I guess you missed the ___'
• Personnel note
• Firm-ly worded letter?
• Written business message, in short