Possible Clues:

• Word
• Declaration sometimes made with crossed fingers behind the back
• Betroth
• Commit to a little coastal walk with one's wife -- finally!
• Order in force demonstrating commitment
• Expectation for Scrooge, say, is incomplete
• Swear word
• Hopeful sign as note is in no fancy language
• Indication of future success
• Word one's put in for me