Related Clues:

• Bread substitute?
• Piece of paper you wouldn't need if both people had Venmo
• Letters that promise payback
• Obligatory letters
• Payback pledge
• Short note?
• Marker for a poor gambler
• Gambler's promise, slangily
• Letters from the hole?
• Frequent preceder of a dollar amount
• Slip in the pot, occasionally
• Note in a pot
• Hole note?
• Outstanding indication
• Bettor's marker