Article 1016 of Civil Code

If the third-party possessor does not elect to pay the registered debts, purge the property of the mortgage, or relinquish that property, the creditor may not take enforcement proceedings against him until after serving him notice to pay the debt due or relinquish the property. Notice shall be served after service on the debtor of the enforcement instrument containing a demand to discharge the debt in accordance with the Law of Procedure, or concurrently with such service.