Contract vs Affidavit: Intent and Demand Determine Enforceability

The Supreme Court’s 2013 ruling in Cruz v. Gruspe (G.R. No. 191431) clarifies two important points in Philippine civil law: first, that a document’s title does not determine its legal nature—the parties’ intent does; and second, that interest on an obligation begins only upon demand, not automatically from a stipulated date. These principles affect anyone who signs a document, whether it is labeled an "affidavit" or a "contract."

The Facts

In October 1999, a mini bus owned by Rodolfo Cruz collided with a car owned by Atty. Delfin Gruspe, totaling Gruspe’s vehicle. The next day, Cruz and Leonardo Ibias went to Gruspe’s office and signed a "Joint Affidavit of Undertaking." In it, they promised, jointly and severally, to replace Gruspe’s car within 20 days with the same model and quality, or alternatively, to pay P350,000.00 with 12% monthly interest for any delayed payment.

When Cruz and Ibias failed to comply, Gruspe filed a complaint for collection of sum of money. The defendants argued that Gruspe, a lawyer, prepared the document and forced them to sign it without explaining its contents. They claimed their consent was vitiated. Ibias later died and was substituted by his widow, Esperanza.

The Issue

The central question was whether the Joint Affidavit of Undertaking was a valid and enforceable contract, despite being titled an "affidavit." A related issue was whether interest could be computed from the stipulated date of November 15, 1999, or only from the date of demand.

The Ruling

The Supreme Court affirmed the enforceability of the document but modified the interest computation.

Title does not determine nature. The Court held that the denomination or title given by the parties is not conclusive of the document’s nature. What matters is the intention of the parties, gathered from the document’s contents. A simple reading of the Joint Affidavit of Undertaking revealed stipulations characteristic of a contract: a promise to replace the car, an alternative obligation to pay P350,000.00, and an interest clause. These were simple terms that both parties could easily understand.

No vitiated consent. The Court rejected the claim of forced signing. An allegation of vitiated consent must be proven by preponderance of evidence, and the defendants failed to do so. They admitted signing the document to secure the release of their vehicle. While the undertaking was onerous and lopsided, that alone does not prove coercion. The Court noted that they could have refused to sign and filed a complaint instead.

Demand is required for default. Under Article 1169 of the Civil Code, a debtor incurs delay only from the moment the obligee judicially or extrajudicially demands fulfillment. The Court found no evidence that Gruspe made a demand before filing the complaint. Therefore, the 12% per annum interest should accrue only from November 19, 1999—the date the complaint was filed, which constituted judicial demand—not from the stipulated date of November 15, 1999.

The Court also affirmed the reduction of the interest rate from 12% per month to 12% per annum, finding the agreed monthly rate excessive.

Practical Takeaways

• Read documents carefully before signing. A document labeled "affidavit" can be treated as a contract if its contents show an agreement with consent, object, and consideration.
• Consent is presumed voluntary. Claims of force or deception must be supported by evidence. Signing to secure the release of property does not automatically amount to vitiated consent.
• Demand matters for interest. Unless the obligation or law expressly states otherwise, interest runs only from the date of judicial or extrajudicial demand—not automatically from a stipulated payment date.
• Excessive interest rates may be reduced. Courts can temper unconscionable interest rates, even if the parties agreed to them.
• Get legal advice before signing undertakings. Especially when the other party is a lawyer or the document imposes significant financial obligations.

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