Tiburcio Mamuyac v. Pedro Abena (Alias Indong)

Summary

This landmark 1939 Supreme Court case establishes the principle of priority in property ownership disputes involving double sales. Gregoria Pimentel sold the same two parcels of land first to Pedro Abena (1926) then to Tiburcio Mamuyac (1927). While Mamuyac's purchase was later in time, Abena's deed was properly registered while Mamuyac's was not. The Supreme Court affirmed lower courts' decisions favoring Abena, ruling that a duly registered deed prevails over an unregistered one regardless of chronological order of sale. The Court also held that Article 1473 of the Civil Code governs conflicts between competing sales, and that private mortgage contracts without proper registration have no legal effect. This case reinforces the Torrens system's emphasis on registration as determinative of property rights, establishing precedent that proper registration trumps mere possession or earlier execution of unregistered documents.