Related Clues:

• Three-vowel promise
• "I'll pay you next Thursday" note
• Short note from a short person
• Letters for a broke bettor
• "Expect the money later" slip
• Letters acknowledging a debt
• Informal promise of payment
• "We'll square up later" letters
• 'The money's coming' note
• "This debt shall be repaid" note
• Promise to pay letters
• Debt voucher, for short
• "Payment forthcoming" note
• Brief promise to pay
• Indication of shyness?