G.R. No. 189859; October 18, 2010
PIO MODESTO and CIRILA RIVERA-MODESTO, Petitioners, vs. CARLOS URBINA, substituted by the heirs of OLYMPIA MIGUEL VDA. DE URBINA (Surviving Spouse) and children, namely: ESCOLASTICA M. URBINA, ET AL., Respondents.

FACTS

Respondent Carlos Urbina filed a complaint for recovery of possession against petitioners Pio and Cirila Modesto before the Regional Trial Court (RTC) of Pasig. Urbina claimed ownership over a parcel of land in Taguig based on his Miscellaneous Sales Application (MSA) filed in 1966. He alleged that the Modestos occupied a portion of the property, negotiated to purchase it, but later cancelled the transaction and claimed ownership themselves. The RTC ruled in favor of Urbina, ordering the Modestos to vacate and pay compensation. The court found that by negotiating to buy the lot, the Modestos acknowledged Urbina’s possessory rights and were thus estopped from later denying them. Concurrently, the Modestos filed a protest against Urbina’s MSA with the Land Management Bureau (LMB), which was denied, with the LMB upholding Urbina’s application. The Court of Appeals affirmed the RTC decision.

ISSUE

Whether the Court of Appeals erred in affirming the RTC’s decision that Urbina had a better right of possession, primarily based on the principle of estoppel and the administrative findings of the LMB.

RULING

The Supreme Court denied the motion for reconsideration and upheld the lower courts’ rulings. The legal logic rests on two key points. First, the principle of estoppel in pais bars the Modestos from challenging Urbina’s right to possess. By entering into negotiations to purchase the property from Urbina, the Modestos clearly recognized his claim of right over it. One cannot deny a fact previously acknowledged through deliberate conduct. Second, the findings of the LMB in the administrative case, which validated Urbina’s MSA and rejected the Modestos’ protest, are accorded great weight and finality on matters within its technical expertise, such as the classification and disposition of public lands. The Modestos’ new argument—that a subsequent LMB order declared the land part of a military reservation—was unavailing. This order was issued after the CA decision had attained finality and pertained to a different, adjacent lot, not the specific lot in dispute. Therefore, Urbina, through his prior MSA and recognized possessory rights, established a superior claim for possession in the accion publiciana case.