Parol Evidence Rule in Philippine Contracts: When Verbal Agreements Cannot Alter Written Terms

The Supreme Court's 2008 ruling in Raymundo v. Lunaria (G.R. No. 171036) offers a clear lesson for anyone dealing with written contracts in the Philippines: a written agreement is powerful evidence of what the parties actually agreed to, and a claim that a later verbal deal changed those terms must be backed by credible proof.

The case also clarifies an important nuance about the parol evidence rule — it does not automatically bar evidence of agreements made after a written contract is signed. But that evidence still has to convince the court.

What Happened in the Case

In May 1996, the Raymundo family asked broker Ernesto Lunaria to find a buyer for their 12,126-square-meter property in Marilao, Bulacan, priced at P60,630,000. Lunaria was promised a 5% agent's commission. After he found a buyer, the parties signed an "Exclusive Authority to Sell" documenting the arrangement.

The sale went through, and the proceeds were held in escrow at Far East Bank. The brokers received partial payment of their commission in February 1997, but when they returned for the balance, they were told nothing more was due. The Raymundos claimed that a verbal agreement after the written contract divided the 5% commission differently: 2/5 for the agents, 2/5 for Lourdes Raymundo (for helping process documents and taxes), and 1/5 for the buyer (for realty tax payments).

The brokers sued to collect the unpaid balance. The trial court ruled in their favor, and the Court of Appeals affirmed with reduced damages. The Supreme Court upheld these rulings.

The Parol Evidence Rule Explained

The parol evidence rule forbids adding to or contradicting the terms of a written contract by presenting testimony or other evidence showing that "at or before" the writing was executed, the parties agreed to different terms. The rule protects the integrity of written agreements.

In this case, the Court agreed with the petitioners that the rule technically did not apply — because the alleged verbal agreement came after the written contract, not before or during its execution. The Court cited Roble v. Arbasa (G.R. No. 130707, 2001) for this proposition.

But that did not save the petitioners. The real question was whether they could prove the subsequent verbal agreement existed at all.

The Burden of Proof: Preponderance of Evidence

In civil cases, the standard of proof is preponderance of evidence — meaning the evidence on one side is more convincing and worthy of belief than the other. The petitioners argued the courts wrongly required them to meet a higher standard.

The Supreme Court disagreed. The lower courts simply found that the petitioners failed to meet even the preponderance standard. Their evidence was weak:

• No written document showed the brokers agreed to the new sharing scheme.
• The worksheet reflecting the commission split was prepared unilaterally by Lourdes Raymundo.
• No court order, tax receipt, or sales document corroborated her claimed role.
• The buyer, who supposedly benefited from the arrangement, was never presented as a witness.
• The claim that the buyer would use his 1/5 share to pay realty taxes was doubtful, since paying realty taxes is the owner's obligation, not the buyer's.

As the trial court noted, if the brokers truly agreed to share their commission, it is hard to understand why no written record of that arrangement exists. The absence of such documentation was "mute but telling testimony" that no such sharing agreement was made.

Joint and Several Liability: A Procedural Lesson

The petitioners also argued that they should not be held jointly and severally liable for the entire broker's fee, citing Article 1207 of the Civil Code on solidary obligations. But the Court found this issue was never raised in their appeal to the Court of Appeals.

Under the doctrine of estoppel, a party who fails to raise an issue on appeal cannot question the resulting judgment later. The ruling on liability became final and binding as to them.

Practical Takeaways

• Written contracts are your best protection. Courts give great weight to written agreements. If you sign one, expect its terms to be enforced.
• A verbal modification after signing is possible but hard to prove. The parol evidence rule may not bar evidence of a later oral agreement, but you will need credible, corroborating proof — not just your own testimony.
• Document any changes to an agreement. If a contract is modified, even informally, get the change in writing or at least gather independent evidence (emails, receipts, witnesses) to support your claim.
• Raise all your defenses on appeal. Failing to raise an issue before the appellate court can bar you from raising it later, even if the issue has legal merit.
• Self-serving testimony is rarely enough. Courts are skeptical of testimony that benefits only the person giving it, especially when documentary evidence could have been produced but was not.

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