The Directive 2014/55/EU requires contracting authorities and contracting entities in Europe to receive and process electronic invoices which comply with the European standard on electronic invoicing and with the two mandatory syntaxes.

In Ireland, the HSE will establish an eInvoicing service compliant with the eInvoicing standard by supporting the technical specifications developed by the PEPPOL community (BIS Billing 3), which ensure compliance with the standard.

In Sicily (Italy), the eProcurement platform will support the PEPPOL specifications and also the Italian CIUS. The web-based solution will support the Italian national Core Invoice Usage Specifications (CIUS) for domestic B2G invoices, the Irish CIUS for Local Authorities and the PEPPOL BIS 3 Billing.