What should I do if my own system is not yet able to create electronic construction invoices or if errors occur when I create them?

In this case, we recommend creating an electronic invoice via the web form of the relevant submission portal, entering the invoice data and attaching the original invoice as a scan or PDF file. As long as the invoice lines are clear in the attachment, you do not need to specify them again in the electronic invoice created in the web form of the submission portal. Whichever way you choose to issue your invoice, any information marked as required in the web submission form needs to be included (required information is specified in section 5 of the E-Invoicing Ordinance).