A certificate used to sign other certificates. Wildcards can be added as domains in multi-domain certificates or Unified Communications Certificates (UCC). Symantec has since reported implementing Certificate Transparency for all its SSL Certificates. Postgraduate education can involve studying for qualifications such as postgraduate certificates and postgraduate diplomas. Colleges offer National Certificates, Higher National Certificates, and Higher National Diplomas. It issues national certificates NC, Diplomas and higher national diplomas HND certificates. Root programs generally provide a set of valid purposes with the certificates they include. The FAA offers a progression of pilot certificates or licenses. Collective certificates, rather than individual certificates, were usually issued. He paid some unredeemed securities by issuing yet another series of Poyaisian land certificates. Let's Encrypt issues certificates valid for 90 days. They meet regularly to discuss web standards such as extended validation certificates. Security is achieved by using digital certificates and encryption. This takes the place of both birth and marriage certificates for international purposes. This may incur costs with extra SSL certificates.