Related Clues:

• Invalidate, as a check
• Null and ___
• Null and --
• "___ where prohibited"
• It's got nothing
• Tear up, as a check
• Of no legal force
• Not occupied
• Empty like space
• Null and empty
• ... and void
• Containing nothing or not legally binding
• Empty space or vacuum
• Empty space or not legally binding
• Having no legal force