As soon as it is received at the National Institute of Industrial Property, the filing gives rise to the allocation of a national number. Where it has not been possible to mention it on the filing receipt, this number shall be notified to the applicant.
Any subsequent correspondence or filing of documents which does not refer to the national number of the application for registration, which does not bear the signature of the applicant or his agent or which, where applicable, is not accompanied by proof of payment of the prescribed fee shall be declared inadmissible.