Spouses Ignacio F. Juico v. China Banking Corporation

Summary

Spouses Juico challenged the validity of unilateral interest rate increases imposed by China Banking Corporation under escalation clauses in their loan agreements after defaulting on P10.355 million in loans. The Supreme Court partly granted their petition, declaring the escalation clause void for violating the principle of mutuality of contracts because it allowed the bank to adjust interest rates without the borrowers' written notice and consent. While recognizing that escalation clauses are generally valid commercial stipulations, the Court emphasized that modifications in loan terms must be mutually agreed upon. The Court reduced the deficiency claim from P8.9 million to P4.76 million by fixing the interest rate at 15% and reducing penalty charges. This decision reinforces the requirement that contractual modifications, particularly in banking transactions, must preserve the essential equality and mutual consent of contracting parties.