To register as a user of the electronic registry and make consultations you will require a digital certificate issued by one of the following authorities:

 DNI electrónico [electronic ID]

 CATCERT (Catalan certification agency)

 CAGVA (Certification authority of the Autonomous Region of Valencia)

 IZENPE

 ANF

 Camerfirma

 ACA

 ANCERT (Notarial certification agency)

 Firmaprofesional

 BANESTO

 SCR (Registrar Certification Service)