When the holder of the contract wishes to assign or pledge his claim, he shall inform the purchaser, who shall send him:
1° Either a copy of the original contract bearing a statement signed by the purchaser indicating that this document is issued in a single copy to enable the holder to assign or pledge the claim arising from the contract;
2° Or a certificate of transferability in accordance with a model and dematerialised in accordance with the procedures defined by an order of the Minister for the Economy appended to this code.