Short answer. No. In an illegal contract that is not a crime, where only the other party is at fault, the innocent party is not bound to perform. You may demand the return of what you have given, without any duty to carry out your own promise, while the guilty party can neither recover what he gave nor force you to perform.
What the law says
When only one of the contracting parties is at fault, he cannot recover what he has given by reason of the contract, or ask for the fulfillment of what has been promised him. The other, who is not at fault, may demand the return of what he has given without any obligation to comply his promise.
Civil Code, Article 1412 — In Pari Delicto: Non-Criminal. Read the full provision →
The rule when only one side is guilty
Article 1412 covers an illegal or forbidden contract whose unlawful cause does not amount to a criminal offense. Where only one of the two parties is at fault, the law splits them apart. The guilty party cannot recover what he has given by reason of the contract, and he cannot ask for the fulfillment of what was promised to him. You, as the party who is not at fault, may demand the return of what you have given without any obligation to comply your promise. In short, you keep your right to recover but shed your duty to perform.
Why the innocent party is favored
The doctrine behind this is in pari delicto — where both are equally guilty, the law leaves them where it finds them and helps neither. Article 1412 recognizes that the parties are not always equally guilty. When your participation was innocent and only the other side acted with the forbidden purpose, treating you both alike would reward the wrongdoer. So the article lifts the bar for you alone: the law will listen to your claim for the return of what you parted with, even though the underlying agreement itself cannot be enforced by anyone.
What being not at fault requires
The relief depends on you genuinely being the party without fault. If both of you knew of and shared the illegal purpose, you are back under the equal-fault rule and neither of you may recover or compel performance. Fault here means real complicity in the unlawful cause, not merely having signed the paper. Because the line between innocent and complicit decides everything, the facts of who proposed the illegal term, who understood it, and who benefited from it are what a court will actually weigh before applying this article to your situation.
The limits of this provision
Article 1412 applies only where the illegal cause is not a criminal offense; when the act is itself a crime, a stricter rule governs and the innocent party's remedies are different. The article also does not make the contract valid or enforceable — the agreement remains one the law will not compel. What it gives the innocent party is restitution: the recovery of what was handed over. It does not award damages for the failed deal, and it does not force the guilty party to complete a bargain the law refuses to recognize in the first place.
Cases citing this provision
These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.
- Hiers of Policronio M. Ureta, Sr., namely: Conrado B. Ureta, et al. vs. Heirs of Liberato M. Ureta, namely: Teresa F. Ureta, et al./Heirs of Liberato M. Ureta, namely: Teresa F. Ureta, et al. vs. Heirs of Policronio M. Ureta, Sr., namely: Conrado B. Ureta, et al, G.R. No. 165748 / G.R. No. 165930, September 14, 2011 — read the decision on LawPhil →
- Jose Menchavez, et al. vs. Florentino Teves Jr, G.R. No. 153201, January 26, 2005 — read the decision on LawPhil →
- Desiderio Ranara, Jr. vs. Zacarias De Los Angeles, Jr, G.R. No. 200765, August 8, 2016 — read the decision on LawPhil →
- Oscar Constantino, et al. vs. Heirs of Pedro Constantino, Jr., rep. by Asuncion Laquindanum, G.R. No. 181508, October 2, 2013 — read the decision on LawPhil →