User to user relations are often used to model a supervisor relation. In corporate environments it is often required that the supervisor is automatically notified about certificates of their subordinates. Right now this can not be modelled in OpenOLAT.
The solution is to add this as a feature to the user-to-user relationship role.
The process that sends the PDF certificates already has the option to send BCC mails. This new configuration does the same. It makes sense to use another mail text for this email to make it feel more natural and address the fact, that the recipient of the mail is not the person who actually got the certificate. The BCC mail text should reflect this.
When modifying the PDF mail text, please also make use of the new formatting options to make it look nice. Add a header etc.