Contract for Sale vs. Promise to Sell and Unilateral Revocation

A party contracted to sell a property, agreeing to transfer ownership upon the buyer's full payment, but later attempted to unilaterally revoke the sale, asserting that the agreement was a mere promise to sell, not a final sale. The Court of Cassation quashed the lower court's decision, reasoning that a contract for the sale of property containing an agreement to transfer ownership immediately upon full payment, even if payment is deferred, constitutes a definitive sale under civil law, and therefore, the vendor could not unilaterally withdraw from the already perfected contract simply by revoking the promise to sell.