Use when building, sending, receiving or validating structured electronic invoices in Europe — EN 16931, UBL 2.1, UN/CEFACT CII, Peppol BIS Billing, Factur-X/ZUGFeRD, XRechnung, FatturaPA, KSeF, RO e-Factura, myDATA — or when asked whether an invoicing feature satisfies a national e-invoicing mandate. Also use when a PDF is about to be described as an e-invoice, when a product starts invoicing into a second EU country, when a validator or a tax platform rejects an invoice, when a credit note or cancellation has to be modelled, and before wiring up any invoice transmission channel.
