When invoicing in Verifactu mode, Billdu requires your client’s required info such:
Name
If your client is a Spanish client - NIF (their tax identification number).
If your client is not a Spanish client - CIN (their company identification number).
Email address
Postal code
In Verifactu context, having these identifiers correct helps ensure the invoice data can be validated and reported properly.
Learn more here:
Does Billdu check if the NIF/CIN “exists”?
Billdu first checks that you filled in the required client identifiers (NIF/CIN) in the app — without them, the invoice can’t be uploaded to Verifactu.
During the Verifactu upload process, we also validate the client details as much as possible (for example: format checks and availability/existence checks where applicable). If something looks wrong, we’ll show you an error so you can fix it before continuing.