A qualified time stamp is the stamp generated with a digital time stamp certificate issued by Trusted Service Providers accredited and supervised by competent bodies. In Spain it is the Ministry of Industry, Commerce and Tourism as is Uanataca. The eIDAS accreditation in the countries of the European Union for the issuance of qualified time stamps is based on compliance with the ETSI EN 319 401 and ETSI EN 319 421 standards. The qualified time stamp provides added value to the use of the signature electronic, since this alone does not provide accurate information on when it was created. For this, it is advisable to issue a stamp or timestamp provided by a trusted third party, a Qualified Time Stamping Authority