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Article 1124 of the French Civil Code

The unilateral promise is the contract by which one party, the promisor, grants to the other, the beneficiary, the right to opt for the conclusion of a contract whose essential elements are determined, and for the formation of which only the consent of the beneficiary is lacking.

Revocation of the promise during the time allowed to the beneficiary to opt does not prevent the formation of the promised contract.

A contract concluded in breach of the unilateral promise with a third party who knew of its existence is void.

Original in French 🇫🇷
Article 1124

La promesse unilatérale est le contrat par lequel une partie, le promettant, accorde à l’autre, le bénéficiaire, le droit d’opter pour la conclusion d’un contrat dont les éléments essentiels sont déterminés, et pour la formation duquel ne manque que le consentement du bénéficiaire.

La révocation de la promesse pendant le temps laissé au bénéficiaire pour opter n’empêche pas la formation du contrat promis.

Le contrat conclu en violation de la promesse unilatérale avec un tiers qui en connaissait l’existence est nul.

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