Facts

• The deceased spouses Jose Zulueta and Soledad Ramos obtained several loans from petitioner Government Service Insurance System (GSIS) between 1956 and 1957, totalling ₱3,117,000, secured by real estate mortgages over their parcels of land.
• The Zuluetas defaulted, and GSIS foreclosed the mortgages. In August 1974 the mortgaged properties were sold at public auction, with GSIS as the highest bidder.
• The certificate of sale, however, expressly excluded ninety-one (91) lots from the foreclosure.
• Notwithstanding that exclusion, GSIS afterwards executed an Affidavit of Consolidation of Ownership that included the ninety-one excluded lots, and obtained titles over them. (GSIS thus held Torrens titles to land it had never bought at the auction — the classic case of registration in the name of one who is not the owner, which the law treats as a constructive trust for whoever is.)
• Respondent Eduardo M. Santiago (the beneficiary of that trust), successor-in-interest of the Zuluetas, sued to recover the excluded lots.
• GSIS raised prescription, arguing that any action for reconveyance based on implied trust had to be brought within ten years from the registration of its titles.
• Regional Trial Court — for Santiago. The Regional Trial Court ruled for Santiago.
• Court of Appeals — affirmed (22 February 2002). The Court of Appeals affirmed in CA-G.R. CV No. 62309 on February 22, 2002.
• Before the Supreme Court. GSIS elevated the case.

Issue

Ruling

Ratio

• The certificate of sale — the instrument defining what GSIS bought — expressly excluded the ninety-one lots.
• GSIS therefore acquired no right whatsoever to them at the auction.
• By consolidating ownership over property it had not purchased, it took what belonged to the Zuluetas without just or legal ground.

• The Court invoked Article 22§:

Every person who acquires or comes into possession of something at the expense of another without just or legal ground, shall return the same to him.

• Coupled with Article 1456§, which makes one who acquires property through mistake or fraud a trustee of an implied trust for the person from whom it came, this made GSIS a constructive trustee of the ninety-one lots for the Zuluetas and their successors.
• 3. Prescription Runs from Actual Discovery — Adille and Samonte.
• On the decisive question of prescription, the Court followed Adille v. Court of Appeals and Samonte v. Court of Appeals, reckoning the ten-year period for an action for reconveyance based on implied trust from the actual discovery of the fraud.
• The rationale is that constructive notice through registration presupposes a registration the true owner had reason to check.
• Where the registration is itself the fraudulent act — a unilateral consolidation covering property the registrant knew it had not bought — it would be perverse to let the wrongdoer count the prescriptive period from his own concealed act.
• The rule that registration is notice to the world cannot be invoked by the very party who obtained the title fraudulently against the owner who had no reason to suspect it.

• Measured from the Zuluetas' successors' actual discovery of GSIS' unauthorised consolidation, the action was timely, and the reconveyance of the ninety-one lots was properly ordered.

Doctrine

• Articles 1456§ and 22. Property acquired through mistake, fraud, or without just or legal ground is held under a constructive trust and must be returned to the true owner.
• Reckoning prescription — the Adille qualification. Although reconveyance based on implied trust generally prescribes in ten years from registration, the period runs from the actual discovery of the fraud where the registration was itself the fraudulent act and afforded the owner no genuine notice.
• Scope of a foreclosure sale. The purchaser at auction acquires only what the certificate of sale covers; lots expressly excluded cannot be swept in by a unilateral affidavit of consolidation.