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Administrative procedure e-voucher

An administrative procedure e-voucher consists of a true copy of the written document, application or notification presented through the on-line office of the UPNA that includes the time and date of presentation of the original, on-line register entry number and all other details concerning the administrative procedure. This voucher is issued by the UPNA’s On-line Registrar’s Office .

Authentic e-copies

Electronic images of documents provided in hard copy by citizens and/or public administrations, equal in terms of both validity and effectiveness, through digitalisation processes performed by the UPNA or an entity acting as trusted third party recognised by the UPNA that guarantee the authenticity, integrity and conservation of the image document.




Certificate revocation

When a certificate is revoked, it is no longer considered valid. The signatory, the natural or legal person that the signatory represents or a Registration authority can request revocation when, for example, the physical support of the certificate has been lost or there exists evidence of fraudulent use.

Certification Authority

A natural or legal person that, in compliance with the legislation governing digital signatures, Act 59/2003, is entitled to issue and manage (renew, suspend and revoke) digital certificates, ensuring maximum levels of security and quality. The basic functions of certification authorities include:
1. Verification of the identities of those applying for certificates
2. Publication of certificate revocation lists. The specifications are described in the standard ISO/IEC 9594-8.
Spanish legislation establishes that Certification Authorities meet the function of “trusted third party”, given that they guarantee users of their infrastructure that those that communicate on-line are who they say they are, leaving no room for identity fraud.

Cryptographic summary or hash function

This is the function that guarantees the integrity of a digital document, i.e. that a digital document has not been modified or tampered with without a record being kept. The standard ISO-10118-3:2004 defines the specifications for hash functions or cryptographic digests, which must possess the following three characteristics:

  • It is impossible to retrieve the original document from the digest/hash.
  • Any change to the original document will lead to a different digest/hash.
  • Two different original documents will have different digests/hashes.



Digital certificate

A document electronically signed by a Certification Authority that verifies the data that it contains: identity of the certificate holder, physical identification number, issuing Certification authority, entitlement to perform a specific act, etc. These data unequivocally identify the signatory in the on-line world.

Digital document

A document written electronically containing digitally signed data. Digital documents may serve as media for public documents, documents issued and private documents.

Digital signature

According to article 3 of Act 59/2003, of the 19th of December, on electronic signatures, the set of data in electronic format, combined with other data or associated with them, which can be used as a way of identifying the signatory.

The following types of digital signature exist:

  • An Advanced digital signature: makes it possible to identify the subject and detect any further change in the information signed, which is exclusively linked to the signatory and the associated data, and which has been created in a way that the signatory can keep under their exclusive control.
  • A Qualified digital signature: an advanced digital signature based on a qualified certificate and generated by a secure signature-creation device. The qualified digital signature has the same value as regards electronically-contained data as a handwritten signature does for information written on paper.




Any of a number of mechanisms that transform traditional offices through the use of new technology, turning what are paper processes into legally valid electronic processes, the goal being to create a paperless office. This new form of Administration permits enhanced productivity and simplifies the different everyday processes performed in different public organisations.
At the same time, e-administration aims to make the Public Administration more accessible to the citizenry through on-line channels, thereby making physical presence unnecessary and offering services 24 hours a day, every day of the year.

Electronic administrative file

A set of computer documents, set out in logical order, informing as to the progress of an application or process that guarantees that the information included cannot be altered or deleted, thereby guaranteeing its integrity and accuracy.
The inalterability and integrity of the electronic documents in an electronic administrative file are guaranteed by the digital signature of the entity in charge of the file.

Electronic administrative procedure

Action performed using information technology (IT) by a user as natural or legal person regarding their administrative file without requiring their physical presence or by a public employee regarding the internal activities required within the organisation in order to process an administrative file.



On-line office

The on-line equivalent of the UPNA's physical offices. See “What is the on-line office?”.

On-line registrar’s office

Register of the documentation received and sent on-line by the UPNA in order to keep a formal record of receipt and dispatch for future consultation and/or proof.



Registration authority

The authority in charge of identifying, registering and issuing digital certificates to users and other entities, delegated by a Certification Authority or other higher Registration body. Digital certificates are issued by a Certification authority to which the registration authority belongs.




Timestamping associates a document with the time and date it was created through a trusted independent party. It therefore accredits the contents of a document at a certain point in time for technical and legal purposes. Timestamping is always accredited by a Certification Authority as trusted third party.