From the option -ERR:REF-NOT-FOUND-"Verification of a third-party Tax ID number in the census of Compulsory Electronic Notifications”</g> of the "My Notifications", you can consult is a specific taxpayer is included in the census of Compulsory Electronic Notifications.
This consultation requires an electronic certificate.
Enter the Tax ID or Foreign nationals’ identity number and the first surname (only in the case of an individual) to check for data in the NEO (Compulsory Electronic Notifications) census.
If yes, confirmation will appear with the effective obligation date
If the Tax ID consulted is not required to receive notifications by electronic means (DEH), the following message will appear:
Alternatively, you can check whether the Tax ID is included in the census of compulsory electronic notifications by going to “My register details” on our “e-Office”.