Short answer. Only those bound by the contract, principally or subsidiarily, may sue to annul it. A stranger with no obligation under the agreement has no standing. And a party cannot invoke a defect he himself caused, or rely on the other side's incapacity when he was fully capacitated.
What the law says
The action for the annulment of contracts may be instituted by all who are thereby obliged principally or subsidiarily.
Civil Code, Article 1397 — Who May Sue for Annulment. Read the full provision →
Being obliged is what gives you standing
Article 1397 of the Civil Code opens the action to all who are thereby obliged principally or subsidiarily. The principal obligor is the party who must perform — the buyer who must pay, the seller who must deliver. A subsidiary obligor is someone like a guarantor, who answers only if the principal fails, and who is therefore also prejudiced by a defective contract. Both may sue. A neighbour who dislikes the sale, a relative who expected to inherit the property, or a competitor who lost the deal is not obliged by the contract at all, and so cannot ask a court to annul it. Their grievance, if any, belongs to some other action.
You cannot rely on a defect you created
The second sentence closes the door on the guilty party. Someone who exerted intimidation, violence or undue influence, employed fraud, or caused the mistake cannot build an annulment case on that very flaw. Nor may a person who was fully capable of contracting allege the incapacity of the one he dealt with — that protection exists for the incapacitated party and those who stand for him, not as an escape hatch for the capacitated side who now regrets the bargain. In practical terms, the vitiated-consent grounds belong to the victim of the vice, not to its author.
What this article does not settle
Article 1397 answers only the question of who may sue. It does not list the grounds for annulment, fix the period within which the action must be brought, or say what happens to the money and property once a contract is annulled — those are separate rules. It is also confined to voidable contracts. Contracts that are void from the start stand on different footing, and rescission for lesion or for fraud against creditors is yet another remedy with its own requirements. Choosing the wrong remedy is one of the commonest ways a good complaint fails.
If you think a contract you signed should be undone
Start by identifying, on paper, exactly what obligation the contract imposes on you — that is your standing. Gather what shows the defect: messages, drafts, witnesses to the signing, medical or guardianship records if capacity is in issue. Be candid with counsel about your own conduct during the negotiation, because a party who applied the pressure loses the very ground he wants to invoke. Note also that a voidable contract can be ratified by later conduct, so continuing to perform after learning of the defect can quietly weaken the case. This is general information, not advice on your own contract.
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.
- Rapid City Realty and Development Corporation vs. Lourdes Estudillo Paez-Cline alias Lourdes Paez-Villa, et, G.R. No. 217148, December 7, 2021 — read the decision on LawPhil →
- Equatorial Realty, et al. vs. Mayfair Theater, G.R. No. 106063, November 21, 1996 — read the decision on LawPhil →
- Allan Mañas, joined by wife Lena Isabelle Y. Mañas vs. Rosalina Roca Nicolasora, et, G.R. No. 208845, February 3, 2020 — read the decision on LawPhil →
- Teodulfo E. Lao, Jr. vs. Lgu of Cagayan De Oro City, G.R. No. 187869, September 13, 2017 — read the decision on LawPhil →