Law 39/2015
Article 16. Records
“4. The documents that the interested parties address to the bodies of the public administrations can be presented:
a) In the electronic register of the Administration or body to which they are addressed, as well as in the other electronic registers of any of the subjects referred to in article 2.1.
b) At post offices, as established by regulations.
c) At Spanish diplomatic representations or consular offices abroad. d) At the registration assistance offices.
e) In any other that establishes the valid dispositions. [...] ”
5. Documents submitted in person to the public administrations must be digitized, in accordance with the provisions of Article 27 and other applicable regulations, by the registration assistance office in which they have been submitted. for incorporation into the electronic administrative file, and the originals must be returned to the interested party, without prejudice to the cases in which the rule determines the custody by the Administration of the documents submitted or it is mandatory to present objects or documents in a specific medium that cannot be digitized. ”
Article 28. Documents provided by those interested in the administrative procedure.
“1. The interested parties must provide the administrative procedure with the data and documents required by the public administrations in accordance with the provisions of the applicable regulations. Interested parties may also provide any other documents they deem appropriate. ”