Related Clues:

• Cancellation stamp
• Unfilled space
• Not good
• Sample-check word
• Undo, in a way
• Void, as a marriage
• Tear up, so to speak
• Invalidated
• Render invalid
• Word on a check
• Invalidate, as a check
• Null and ___
• Blank space
• Null and --
• Invalidate a marriage