From AOC Support we can only help you with access to the notification.

For information on how to respond to the notification you received or if you have any doubts about its content , contact the organization that sent it to you. We provide you with the addresses of the electronic offices of some administrations in case you do not have the contact:

In the notification mailbox of the e-NOTUM service you will find the electronic notifications of public bodies that send notifications through this service.

List of organizations that use the service (Excel)

It might interest you