Amendments arise because of a number of reasons. I can identify four main reasons here. First, at the time of filing the pleadings, the factual situation sought to be amended was not available or if available was not within the reasonable anticipation of the party and his counsel, employing all diligence and intellectual resources at their command. Second, although the factual situation sought to be amended existed at the time the pleadings were filed, human idiosyncrasies, human lapses and human frailties resulted in its non-inclusion. This could either be the fault of the party or counsel or both. . Third, when there is a Reply to either the Statement of Claim or the Statement of Defence. Four, when the court suo motu raises a factual situation. Since this last reason is not consistent with our adversary system, a trial Judge should only resort to it when it is absolutely necessary so to do and in the overall interest of the parties. He cannot do so willy nilly and by his whims.
— Tobi, JCA. Abraham v Olorunfunmi (1990) – CA/L/83/89