declare null and void

Even engagements entered into on oath he could declare null and void, in case they militated against the welfare of the Church.

From Klytia A Story of Heidelberg Castle by Adolf Hausrath

Such I revoke and declare null and void.

From The Philippine Islands, 1493-1898 — Volume 21 of 55 1624 Explorations by early navigators, descriptions of the islands and their peoples, their history and records of the catholic missions, as related in contemporaneous books and manuscripts, showing the political, economic, commercial and religious conditions of those islands from their earliest relations with European nations to the close of the nineteenth century. by James Alexander Robertson

Therefore, from the nature of the American constitutional system the courts must declare null and void all acts which are not authorized.

From History of the United States by Charles A. (Charles Austin) Beard

We again declare null and void a compact which disposes of us against our consent.

From The Pl?biscite or, A Miller's Story of the War by Alexandre Chatrian

He might declare null and void, and forbid the people to obey, a law of any state, if he thought it was injurious to the interests of the Church.

From A Political and Social History of Modern Europe V.1. by Carlton J. H. Hayes