Supervening event

A supervening event consists of facts that transpire after the judgment became final and executory, or of new circumstances that develop after the judgment attained finality, including matters that the parties were not aware of prior to or during the trial because such matters were not yet in existence at that time. In that event, the interested party may properly seek the stay of execution or the quashal of the writ of execution, or he may move the court to modify or alter the judgment in order to harmonize it with justice and the supervening event. The party who alleges a supervening event to stay the execution should necessarily establish the facts by competent evidence; otherwise, it would become all too easy to frustrate the conclusive effects of a final and immutable judgment. (Abrigo v. Flores, 711 Phil.251, 262 [2013])