Unjust Enrichment Claims and the Burden of Proving Evidence in Philippine Law

The Supreme Court's 2018 ruling in Rodriguez v. Your Own Home Development Corporation clarifies an important point in Philippine civil procedure: a claim for unjust enrichment cannot prosper without solid evidence. The case also demonstrates how the rules on documentary evidence—particularly the distinction between public and private documents—can determine the outcome of a lawsuit.

The Facts of the Case

Iris Rodriguez sought reimbursement of P424,000.00 from Your Own Home Development Corporation (YOHDC) based on the principle of unjust enrichment. The amount allegedly represented payments made to a surveyor, Senen Delos Reyes, for services rendered in connection with a low-cost housing project in Occidental Mindoro.

The controversy arose after YOHDC discovered that checks intended for Delos Reyes and another payee were deposited into the personal bank accounts of Rodriguez and her husband, who worked as project coordinator for the housing venture. YOHDC later reimbursed the amounts after the intended payees denied receiving the checks.

Rodriguez claimed that Delos Reyes had admitted receiving P424,000.00 in his Answer to the complaint. The Regional Trial Court initially ruled in her favor, but the Court of Appeals reversed, and the Supreme Court affirmed the appellate court's decision.

The Issue Presented

The sole question before the Supreme Court was whether YOHDC was liable to Rodriguez for P424,000.00 based on unjust enrichment. The Court also had to determine whether Rodriguez had properly raised a question of law or merely a question of fact.

The Ruling: Questions of Fact Are Not Reviewable

The Supreme Court denied the petition, noting that Rodriguez raised a factual issue. Under Rule 45, Section 1 of the Rules of Court, a petition for review on certiorari before the Supreme Court must raise only questions of law, which must be distinctly set forth.

Whether Delos Reyes had actually been paid P424,000.00 is a question of fact. It requires a review of evidence and a determination of the truth or falsity of the parties' allegations. The Court reiterated that it is not its function to re-analyze or weigh evidence that has already been considered by the lower courts.

The Evidentiary Value of Notarized Documents

The Court also addressed the evidentiary weight of the conflicting documents. Delos Reyes had executed a notarized Affidavit on March 14, 1995, categorically denying that he received, encashed, or deposited the checks. Later, however, an alleged Acknowledgment dated June 9, 1995, and his Answer to the complaint suggested he had received P424,000.00.

The Supreme Court gave more credence to the notarized Affidavit. Under Philippine rules of evidence, a notarized document is presumed valid, regular, and genuine. It carries evidentiary weight with respect to its due execution and need not be proven authentic before admission. To nullify a notarized document, there must be strong, complete, and conclusive proof of its falsity—clear, convincing, and more than merely preponderant evidence.

In contrast, the Acknowledgement relied upon by Rodriguez was a private document. Private documents must first be authenticated before they can be admitted as evidence. The best proof available must be presented, such as testimony from a witness who saw the document executed or evidence of the genuineness of the signature or handwriting of the maker.

Retractions Are Viewed with Disfavor

The Court also treated the Acknowledgement as a retraction of the earlier notarized Affidavit. Philippine jurisprudence views retractions with considerable disfavor because they can easily be fabricated. Courts examine the circumstances surrounding a retraction and the possible motives for reversing a previous declaration.

Here, Delos Reyes never appeared in court to attest to the genuineness of the Acknowledgement or to explain his Answer. His alleged admission in the Answer only pertained to the existence of the Acknowledgement, not its authenticity or the truth of its contents. Moreover, he did not categorically admit that the P424,000.00 came from the proceeds of the specific checks in question.

Practical Takeaways

• A claim for unjust enrichment requires clear and convincing evidence that one party was benefited at another's expense without legal or contractual basis.
• Petitions for review before the Supreme Court under Rule 45 must raise only questions of law. Factual disputes should be resolved in the trial court and the Court of Appeals.
• Notarized documents enjoy the presumption of regularity and are admissible without further proof of authenticity. To challenge them, a party must present clear, convincing, and conclusive evidence of falsity.
• Private documents must be authenticated before admission. The best proof available—such as testimony from a witness to the document's execution—must be presented.
• Retractions of prior statements, especially notarized ones, are viewed with disfavor by Philippine courts. A subsequent inconsistent statement does not automatically negate an earlier notarized declaration.

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