Buyer v. Seller: Breach of Unilateral Promise to Sell and Deposit Restitution

A party, having contracted to purchase land and paid a deposit, sought annulment of the sale and restitution of the deposit after the seller refused to proceed unless the buyer agreed to an increased price, with the lower court finding the refusal to be a breach of the unilateral promise to sell, thereby justifying the annulment and ordering the return of the deposit. The high court upheld this decision, reasoning that the unilateral promise, once accepted by the beneficiary, forms a bilateral contract, and the seller's subsequent refusal to execute the sale at the agreed price constitutes a fault justifying the contractual remedy sought by the buyer, including the recovery of the advance payment.