The credit institution, finance company or FIA referred to in Article L. 313-23 may, at any time, prohibit the debtor of the assigned or pledged receivable from paying into the hands of the signatory of the slip. From the date of this notification, the form of which is determined by the decree of the Conseil d’Etat provided for in article L. 313-35, the debtor is only validly discharged by the credit institution, finance company or FIA mentioned in article L. 313-23.