Related Clues:

• Promissory note, abbr
• Borrower's letters
• Payment option that's not always accepted
• Note from an unlucky gambler?
• Debt slip
• Voucher for college buffet
• Promise from a shy person?
• Broke gambler's offering
• Note in a poker game
• Letters written before a dollar amount, sometimes
• Note from one who's short
• Bread substitute?
• Piece of paper you wouldn't need if both people had Venmo
• Letters that promise payback
• Obligatory letters