not valid
- invalidWithout legal force
- voidWithout legal effect
- nullAbsence indicator in code
- expiredNo longer in effect
- bogusCounterfeit or fraudulent
fake · counterfeit · forged · fraudulent · illegitimate · worthless · rejected · canceled · revoked · phony · false · spurious · defunct · lapsed · disqualified · annulled · unauthorized · illegal
logical/legal validity
not validvalid
Legally or logically sound
legitimate · sound · legally binding · legal · binding
practical effectiveness
not validvalid
Legally or logically sound
acceptable · working · functional · operative · usable