A Certifying Authority is a trusted entity, responsible for issuing and revoking the digital or certified certificates used in the electronic signature. Legally, it is a particular case of Certification Service Provider.

The following URL associated with the text can be consulted: Spanish Certification Authorities issuing qualified certificates associated with undertakings (using the corresponding form).

If you want to check if a certificate issued by one of these providers is admitted to most of the formalities with the Public Administration you can check it in the list of providers listed in this page (using the corresponding form) or you can verify it directly from the Invented name.