Related Clues:

• Markers
• Debtor's letters
• Notes of a sort
• Letters of credit?
• Marker, briefly
• Letters for debtors
• Debtor's marker
• Short person's slip?
• Evidence of obligation
• Part of a poker pot
• Account receivable
• Losing gambler's marker
• Letters from a debtor?
• Creditor's chit
• Letters of note?