The EU Digital COVID Certificate is issued to residents of the EU and is proof (in digital or paper format) that a person has either:
National authorities are responsible for issuing the certificate. It may be issued, for example, by hospitals, testing centres or health authorities.
The digital version can be stored on a mobile device. Citizens can also request a paper version. Both will have a QR code containing essential information, as well as a digital seal to ensure that the certificate is authentic.
For more information you can consult the European Union (EU) website.