R. J. FRANCISCO
PLEADINGS AND TRIAL PRACTICE
Volume II 1996
Page 851
"x x x.
Although the court cannot refuse to issue a writ of execution upon a final and executory judgment, or quash it, or order its stay (Amor vs. Jugo, 77 Phil. 703) because the issuance of the corresponding writ of execution upon a final and executory judgment is a ministerial duty of the court compellable by mandamus, (Ebero vs. Cañizares, 79 Phil. 152) it may do so in the following instances:
(a) When there had been a change in the situation of the parties which makes execution inequitable; (Warner, Barners & Co. vs. Jaucian, 13 Phil. 4; Lee vs. Mapa; 51 Phil. 624).
x x x."