An E-Invoice, also known as a digital invoice, represents the modernized form of a traditional invoice, streamlining the exchange of invoices between suppliers and vendors through authority control and document validations. This efficient process is further enhanced by the integration of E-Invoicing projects with (ERP) systems, allowing for automated invoice generation. Alternatively, businesses can opt to manually create invoices using authority portals or e-invoicing service provider solutions, depending on their invoicing volume and preferences.

The diagram below illustrates the standard e-invoicing cycle, a protocol commonly adopted by countries that have mandated the incorporation of e-invoicing.