Article 1461. Things having a potential existence may be the object of the contract of sale.
The efficacy of the sale of a mere hope or expectancy is deemed subject to the condition that the thing will come into existence.
The sale of a vain hope or expectancy is void. (n)
Article 1462. The goods which form the subject of a contract of sale may be either existing goods, owned or possessed by the seller, or goods to be manufactured, raised, or acquired by the seller after the perfection of the contract of sale, in this Title called "future goods."
There may be a contract of sale of goods, whose acquisition by the seller depends upon a contingency which may or may not happen. (n)
Article 1465. Things subject to a resolutory condition may be the object of the contract of sale. (n)
Article 1503. When there is a contract of sale of specific goods, the seller may, by the terms of the contract, reserve the right of possession or ownership in the goods until certain conditions have been fulfilled. The right of possession or ownership may be thus reserved notwithstanding the delivery of the goods to the buyer or to a carrier or other bailee for the purpose of transmission to the buyer.
Where goods are shipped, and by the bill of lading the goods are deliverable to the seller or his agent, or to the order of the seller or of his agent, the seller thereby reserves the ownership in the goods. But, if except for the form of the bill of lading, the ownership would have passed to the buyer on shipment of the goods, the seller's property in the goods shall be deemed to be only for the purpose of securing performance by the buyer of his obligations under the contract.
Where goods are shipped, and by the bill of lading the goods are deliverable to order of the buyer or of his agent, but possession of the bill of lading is retained by the seller or his agent, the seller thereby reserves a right to the possession of the goods as against the buyer.
Where the seller of goods draws on the buyer for the price and transmits the bill of exchange and bill of lading together to the buyer to secure acceptance or payment of the bill of exchange, the buyer is bound to return the bill of lading if he does not honor the bill of exchange, and if he wrongfully retains the bill of lading he acquires no added right thereby. If, however, the bill of lading provides that the goods are deliverable to the buyer or to the order of the buyer, or is indorsed in blank, or to the buyer by the consignee named therein, one who purchases in good faith, for value, the bill of lading, or goods from the buyer will obtain the ownership in the goods, although the bill of exchange has not been honored, provided that such purchaser has received delivery of the bill of lading indorsed by the consignee named therein, or of the goods, without notice of the facts making the transfer wrongful. (n)