Related Clues:

• Letters from a short person?
• Note in place of money
• Paper in a poker pot
• Slip in the pot
• Beholden letters
• Poker game memento, maybe
• Debtor's acknowledgment
• Written debt acknowledgment
• Personal marker
• Note left after stealing your roommate's beer
• Letters written by a shy guy?
• Evidence of debt
• 'Next round's on me'
• Informal repayment promise
• Note promising notes