Related Clues:

• Poker IOU
• Debt notice
• Letters often followed by a dollar amount
• Promise to pay, briefly
• Casino IOU
• Marker, of sorts
• Gambling note
• Promising letters
• Commitment to pay
• Brief promise?
• IOU of sorts
• Chit sheet
• Gambler's note, slangily
• Debtor's pledge
• Debt evidence