Valencia v. Leoncio

Summary

The Valencia spouses guaranteed Antonio Maglalang's P1,800 debt to Roman Leoncio under a court-approved amicable settlement. When Maglalang defaulted and execution was levied against the guarantors, they moved to be released claiming the creditor had secretly granted extensions to the debtor without their consent. The Municipal Court released them, but the Court of Appeals nullified this as an improper amendment of a final judgment. The Supreme Court reversed, holding that under Article 2079 of the Civil Code, a guarantor is released when the creditor grants an extension to the debtor without the guarantor's consent. The Court found the Municipal Court acted within its jurisdiction in applying this legal principle to release the guarantors based on factual findings that such extensions were granted. This case establishes the important civil law principle protecting guarantors from prejudicial agreements between creditors and principal debtors made without their knowledge.