I must observe that in trying to answer these important questions, learned counsel for the respondents tried to take umbrage under the statement of Lord Denning in Macfoy v. United African Co. Ltd. (1961) 3 W.L.R. 1405 at p.1409, P.C. where he said: Any purported exercise of any function being without any legal or Constitutional authority was null and void and of no effect. . .” If an act is void, then it is in law a nullity. It is not only bad but incurably bad. There is no need for an order of the court to set it aside. It is automatically null and void without much ado, though it is sometimes convenient to have the court declare it to be so. And every proceeding, which is founded on it, is also bad and incurably bad. You cannot put something on nothing and expect it to stay there. It will collapse. With respects to the learned counsel for the respondents, it appears to me that the very eminent Lord Justice’s aim in this much misquoted and misapplied dictum was again talking of the effect in law of a judgment being declared void. It is “automatically null and void without more ado” and every proceeding which is founded on it is also bad and incurably bad.” His Lordship did not say that it ceases to exist as a fact. I agree with Chief Williams that there is a world of difference between saying that a judgment has no legal effect or consequences and saying that it is non-existent; between giving a judgment which is a nullity because, say, it was given without jurisdiction and saying that no judgment was given at all. The learned Justice of Appeal was, therefore, in error when he held that because the previous judgment of the Court of Appeal had been nullified by this court-for having been delivered more than three months of the conclusion of the final addresses, it follows that the judgment was non-existent. In my view, although, by its being declared a nullity, the judgment had no more any legal effect, it continued to exist de facto.
— P. Nnaemeka-Agu JSC. Gbaniyi Osafile v. Paul Odi (SC 149/1987, 4th day of May 1990)