Identity link
An identity link is used to establish a connection between your qualified certificate and your source PIN. Since you are only identified in the certificate by your name, mix-ups can occur if someone has the same name as you. On a technical level, the identity link is a file signed by the SourcePIN Register Authority in XML format. It is saved to the chip on your card during the activation process.
For reasons of data protection MOCCA is not allowed to show the source PIN.