When a Co-Owner Sells an Undivided Share: Ejectment and the Right to Partition

The line between a lawful occupant and an intruder can blur when a family property is sold piecemeal. In Bulalacao-Soriano v. Papina (G.R. No. 213187, August 24, 2016), the Supreme Court settled a dispute over a 201-square-meter lot in Daet, Camarines Norte, ruling on who may validly enter a partition agreement after one co-owner sells an undivided share. The case clarifies how ejectment suits interact with ownership claims and why a buyer of an aliquot share steps into the seller's shoes.

The Dispute: A Loan, a Sale, and a Partition

The property originally belonged to Tomas de Jesus and was later sold to brothers Ernesto and Manuel Papina. The brothers allowed Haide Bulalacao-Soriano to build a house on the lot, with the understanding that she would surrender possession if the owners needed the property.

In 1993, the brothers mortgaged the property to Haide to secure a P25,000 loan. When the loan was not fully repaid, Manuel, without Ernesto's knowledge, sold his share to Haide in 2000 for P100,000 payable in installments. Haide paid P91,500, leaving a balance of P8,500. She later claimed that Manuel instructed her to pay the property's unpaid taxes and credit the amount against the balance. She spent P20,780 for this purpose.

In 2005, the brothers executed a Subdivision Agreement partitioning the property into two lots. Lot 1, assigned to Ernesto, was where Haide's house stood. Ernesto demanded that Haide vacate, and when she refused, he filed an ejectment complaint.

The Issue: Was There Unlawful Detainer?

The central question was whether Ernesto had a valid case for unlawful detainer against Haide. Unlawful detainer is an action to recover possession from one who illegally withholds property after the expiration or termination of a right to hold possession under any contract, express or implied. The possession starts as legal but becomes illegal upon termination of the right to possess.

The lower courts ruled in Ernesto's favor, holding that Haide's right to possess expired when the brothers executed the Subdivision Agreement. The Supreme Court, however, reversed.

The Ruling: The Buyer of an Undivided Share Becomes a Co-Owner

The Court explained that only co-owners have the capacity to enter into a partition agreement that dissolves co-ownership. A partition agreement entered into by someone who is no longer a co-owner is null and void.

Citing Del Campo v. Court of Appeals (G.R. No. 108228, February 1, 2001), the Court held that the buyer of an undivided share becomes a co-owner at the time the sale is made in their favor. Upon a consummated sale, the seller who has alienated their entire undivided share can no longer participate in the partition. Instead, the buyer steps into the seller's shoes as co-owner and acquires the right to enter into a partition agreement.

The pivotal issue was whether Haide had fully paid the contract price. The Court found preponderant evidence that she had. She submitted receipts for the P20,780 she paid for taxes, which covered the P8,500 balance. Notably, Manuel never demanded payment of any balance, and the payments began six months before the Subdivision Agreement was executed.

Since Manuel had already been divested of his rights by the consummated sale, he could no longer validly enter into the Subdivision Agreement with Ernesto. The agreement was therefore defective, if not invalid, and could not defeat Haide's right to acquire Manuel's share.

A Provisional Resolution Only

The Court was careful to note that it was only provisionally resolving the issue of ownership because it was closely intertwined with the issue of possession. The decision did not preclude a later, definitive resolution of ownership issues—such as whether Haide fully paid her obligation, whether she could validly offset her expenses, and whether the partition agreement was fraudulent—in a more appropriate proceeding where Manuel would be impleaded as a party.

Practical Takeaways

• A buyer of an undivided share in a co-owned property becomes a co-owner upon a consummated sale. The seller loses the right to participate in a partition agreement.
• Ejectment courts may provisionally rule on ownership when the question of possession cannot be resolved without deciding ownership. This is allowed under Section 33(2) of Batas Pambansa Blg. 129.
• A partition agreement entered into by someone who is no longer a co-owner is null and void. Only current co-owners may validly dissolve the co-ownership.
• In unlawful detainer cases, the one-year period to file runs from the date of demand to vacate. Here, the demand was made on March 19, 2006, and the complaint was filed on May 29, 2006—well within the period.
• Documentation matters. The Court gave weight to receipts and the absence of any demand for payment from the seller, which supported the buyer's claim of full payment.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.