Contractual Obligations: Interpreting Intent and the Parol Evidence Rule in Loan Agreements

The Supreme Court's 2009 decision in Norton Resources and Development Corporation v. All Asia Bank Corporation (G.R. No. 162523) is a reminder of a rule that governs every written contract in the Philippines: what the parties signed is what the law will enforce. For borrowers and lenders alike, the case shows how difficult it is to escape the plain terms of a loan agreement by claiming that the real deal was different.

The loan, the fee, and the falling out

In April 1982, Norton Resources obtained a P3.8 million loan from All Asia Bank (then Banco Davao-Davao City Development Bank) to build 160 housing units in Matina Aplaya, Davao City. On the same day, the parties signed a Memorandum of Agreement (MOA) under which Norton agreed to pay a commitment and service fee of P320,000, payable in two equal installments timed to the first and second releases of the loan proceeds. The bank deducted the full amount in advance.

Norton completed only 35 of the 160 planned units and eventually defaulted on the loan. The Home Financing Corporation, which had guaranteed the loan, paid most of the outstanding balance but withheld P250,000. That amount became the subject of a separate collection case, which was decided in the bank's favor and became final.

Years later, in 1993, Norton sued the bank for the return of P250,000. Norton argued that the commitment fee was really computed at P2,000 per housing unit, so it should have paid only P70,000 for the 35 units actually built. The bank insisted the fee was a flat amount, already fully earned.

What the courts ruled

The Regional Trial Court agreed with Norton and ordered the bank to refund P250,000 with interest. The Court of Appeals reversed, holding that the MOA said nothing about a per-unit arrangement. The Supreme Court affirmed the Court of Appeals.

The Court anchored its ruling on Article 1370 of the Civil Code: if the terms of a contract are clear and leave no doubt as to the intention of the parties, the literal meaning of its stipulations controls. Paragraph 4 of the MOA stated a single figure—P320,000—payable in two installments. Nothing in the text tied the fee to the number of units actually constructed.

The parol evidence rule

Norton tried to introduce testimony to show that the parties had actually intended a per-unit computation. The Court rejected this under the parol evidence rule, now found in Section 9, Rule 130 of the Revised Rules of Court. When the terms of an agreement are reduced to writing, the writing is considered to contain all the terms agreed upon, and no evidence of other terms may be admitted between the parties.

The rule has recognized exceptions—such as an intrinsic ambiguity, a mistake or imperfection in the writing, the failure of the writing to express the true intent of the parties, or the existence of later agreements. The Court found that none applied. Notably, the subdivision survey plan Norton relied on to prove the 160-unit computation was dated and approved after the MOA was signed, making it impossible for the bank to have used it as the basis for the fee during negotiations. Testimonial claims also conflicted with the documentary evidence.

Why the written word prevails

The decision restates several settled principles. A contract is the law between the parties, and courts must enforce it as written so long as it is not contrary to law, morals, good customs, or public policy. Courts cannot rewrite a contract simply because it turned out to be harsh or inequitable for one side.

The Court also addressed Norton's belated argument that the MOA was a contract of adhesion. It held that this theory was raised for the first time on appeal and could not be considered. In any event, contracts of adhesion are not invalid per se; a party who adheres to such a contract is free to reject it, and adherence amounts to consent.

Practical takeaways

• Read the contract as written. If a fee, interest rate, or payment schedule is stated as a fixed amount, courts will enforce that figure—not a computation the parties never put in writing.
• Put every material term in the document. Verbal side agreements, computations, or assumptions are generally inadmissible to vary a written contract under the parol evidence rule.
• Check the dates. Evidence created after a contract is signed cannot prove what the parties intended when they signed it.
• Raise defenses early. New legal theories—such as claiming a contract of adhesion—cannot be introduced for the first time on appeal.
• Adhesion contracts are binding. Signing a ready-made contract without negotiating its terms does not, by itself, invalidate it.

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