No one is considered as deceiving those who know and consent to his acts.

Explanation

(English-origin maxim.) Volenti non fit injuria — a person who enters a transaction with full knowledge of the other party's conduct and consents to it cannot afterward claim to have been deceived.

Where this applies

• A man who knowingly buys a used car "as-is" after test-driving it and noticing the engine noise cannot later claim the seller deceived him about the car's condition.
• A tenant who signs a lease fully aware that the apartment has no air conditioning cannot sue the landlord for fraud over the missing AC.
• An investor who reads the prospectus disclosing high risk and invests anyway cannot claim she was deceived when the investment loses value.