Article 224 of Commercial Code

1 - The pledge shall not be effective against third parties unless possession of the pledged thing is transferred to the pledgee or to another person designated by the contracting parties, and it remains in the possession of whichever of them received it until the pledge expires. 2 - The pledgee or the person designated by the contracting parties shall be deemed to possess the pledged thing: a If it is placed at his disposal in a manner leading third parties to believe that the thing has come into his custody. b If he receives an instrument representing the pledged thing and giving its holder, to the exclusion of others, the right to delivery of that thing.