Related Clues:

• Payer's promise
• Saloon bill
• Debtor's promise
• Promising letters?
• File part
• Debtor's onus
• Debtor's slips
• Collar part
• Poker pot paper, perhaps
• Beer can feature
• Promise of repayment
• Bar total
• Soda can opener
• Indebtedness initials
• Gambler's debt, so to speak