be null and void

常见例句

Article 58 Civil acts in the following categories shall be null and void
第五十八条下列民事行为无效
Any alteration of this Agreement without duly authorized signature shall be null and void.
本合同涂改的部分、未经合法授权代签，无效。
Administrative punishments shall be null and void, if they are inflicted without legal basis or without the observation of the legal procedure.
没有法定依据或者不遵守法定程序的，行政处罚无效。

If the stock is not produced, then the shorting transaction will be null and void and the broker will have to purchase the stock, says Jamie Selway, managing director at White Cap Trading.
FORBES: Magazine Article
The West German government many years ago declared the Hitler-Stalin Pact and its fatal terms to be shameful and to be legally null and void.
CENTERFORSECURITYPOLICY: Freedom Flame 2013
If they rejected peace, then everything Olmert said would become null and void, and be tossed down the memory hole.
CENTERFORSECURITYPOLICY: Fool me twice