Related Clues:

• Key on a keyboard
• Item that's often picked up
• IOU
• Acknowledgement of a debt
• Running total
• Can opener?
• You receive it for free in every restaurant
• Paper in lieu of payment
• Check for Hunter?
• Promissory note acronym
• Pop-top
• Acknowledgement of debt
• Gambler's marker
• Key for indenting
• Unofficial promissory note