Article 973

A bilateral declaration without material acts is sufficient for the transfer of possession:

where the transferor possesses the property and henceforth holds it for the acquirer by virtue of a stipulation made at the time of delivery;

where the acquirer was holder of the property for the transferor; and

where a third party held the property for the transferor and holds it for the recipient after the transfer. In this event possession does not pass until the third party has acknowledged the transfer or has been notified of it by the transferor or acquirer.

Nothing in this Article shall affect the rights of the creditors of the person exercising actual control over the property in the event of his bankruptcy, unless they knew or should have known that this person was not the owner of the property.