Possible Clues:

• 'This might be of interest,' on a memo
• "I feel I should tell you," briefly
• Memo opener, often
• Memo starter
• 'Just so you're aware...'
• Post-it note abbr
• Relative of "BTW"
• Letters with a link, maybe
• Letters at the top of an interoffice memo
• 'In case it's of interest ...,' on a memo