Digital signature specifications should comply with the policy for digital signature and certificates in the sphere of the General State Administration and its public bodies, by means of the use of certificates of those specified in subparagraphs a) and b) of Article 13.2 of Law 11/2007, of 22 June, on Citizens’ Electronic Access to Public Services.
List of providers of certification services
Point of information on digital signature at the Fábrica Nacional de Moneda y Timbre (FNMT)