Short answer. Being misled by an outsider is usually not a ground to annul the contract. Article 1342 of the Civil Code says misrepresentation by a third person does not vitiate consent, unless it created a substantial mistake and that mistake was mutual, meaning the other contracting party laboured under the same error.
What the law says
Misrepresentation by a third person does not vitiate consent, unless such misrepresentation has created substantial mistake and the same is mutual.
Civil Code, Article 1342 — Misrepresentation by a Third Person. Read the full provision →
Why the contract normally stands
The rule protects the innocent party across the table. If a stranger lied to you and the person you contracted with knew nothing about it, that person did nothing wrong and should not lose the bargain because of a deception they had no part in. So the default is that the contract holds and your quarrel is with the liar, not with your counterparty. This is a deliberate allocation of risk: between two innocent people, the loss stays with the one who chose to rely on the third person’s word.
The narrow exception: substantial and mutual
The contract can be annulled only where both conditions are met. The mistake must be substantial — going to the substance of the thing, or to those conditions which principally moved one or both parties to enter the contract, not to a collateral detail. And it must be mutual, meaning both parties were operating under the same false belief.
In that situation there is no real meeting of minds on what was being agreed at all, which is why the law relieves both sides rather than favouring one. A mistake you alone made, however serious it felt, does not fit.
Where your remedy actually lies
Two other possibilities are worth checking before accepting that you are bound. First, if the third person was in truth acting for your counterparty — an agent, a broker, a relative sent to close the deal — then the misrepresentation is not really by a stranger at all, and the ordinary rules on fraud by a contracting party apply. Second, if your counterparty knew of the lie and stayed silent to profit from it, that silence can itself be the fraud.
Failing both, your claim is against the person who deceived you, for damages. Preserve the messages, the identity of who said what, and any commission or benefit that person received, because those facts decide which of the three routes is open to you.
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.
- Phil. Bank of Communications vs. Court of Appeals, et al, G.R. No. 109803, April 20, 1998 — read the decision on LawPhil →