Estoppel In Pais
The principle of estoppel in pais applies wherein one, by his acts, representations or admissions, or by his own silence when he ought to speak out, intentionally or through culpable negligence, induces another to believe certain facts to exist and such other rightfully relies and acts on such belief, so that he will be prejudiced if the former is permitted to deny the existence of such facts. (Hanopol v. Shoemart, Inc., G.R. No. 137774, October 4, 2002, 390 SCRA 439; Phil. Realty Holdings Corp. v. Firematic Phils. Inc., G.R. No. 156251, April 27, 2007, Callejo, J).