It is not uncommon for a person to sell an entire property despite owning only a portion of it. This usually happens in inherited land, family properties, or co-owned assets where one party takes the lead and assumes broader authority than the law allows. Buyers, trusting appearances and representations, often believe the sale covers the whole property. Philippine law, however, is clear on this point: no one can sell what he does not own.

Under Article 493 of the Civil Code, each co-owner has full ownership of his ideal or undivided share, but he does not own any specific physical portion of the property. While a co-owner may sell, assign, or mortgage his share, he cannot validly dispose of the entire property without the consent of the other co-owners.

This distinction is frequently overlooked. A deed of sale may describe the entire parcel of land, and the seller may even be in possession of it. Yet if the seller owns only a fractional interest, the law limits the effect of the sale to that interest alone.

The Supreme Court addressed this issue in Cruz v. Bancom Development Corporation (G.R. No. 147788, 6 December 2006). The Court ruled that a co-owner who sells the entire property without authority does not convey ownership over the shares belonging to the other co-owners. The sale is valid only with respect to the seller’s undivided share and ineffective as to the rest.

For buyers, this creates a serious risk. What appears to be a complete acquisition may legally result in co-ownership with strangers. The buyer steps into the shoes of the selling co-owner and acquires only the rights that the seller legally possessed, nothing more.

This situation often surfaces years after the sale, when other heirs or co-owners assert their rights. At that point, the buyer may be forced into partition proceedings or face demands for recognition of the remaining owners’ interests. The problem is not cured by possession, payment, or even registration if the seller lacked authority over the entire property.

Good faith does not automatically shield the buyer. While good faith may affect remedies and damages, it cannot expand ownership beyond what the law allows. Title examination and verification of ownership shares remain indispensable, particularly in properties that originated from inheritance.

The lesson is straightforward: ownership must be verified not only as to who owns the property, but how much they own. A single signature does not always represent complete authority.

At De Castro Law Firm, we frequently assist clients who discover, after the fact, that their “purchase” resulted in unintended co-ownership. These disputes are preventable, but only when ownership structures are carefully examined before the sale.

References

Civil Code of the Philippines (Republic Act No. 386).

Cruz v. Bancom Development Corporation, G.R. No. 147788 (Supreme Court of the Philippines, December 6, 2006).