The document discusses the implementation of e-invoicing in public procurement in Greece according to the European Directive on electronic invoicing. It provides an agenda that covers an introduction to e-invoicing in Greece, the main components and tools, the current status, a typical process flow, conclusions, and challenges. The key points are that Greece has transposed the EU directive into national law and adopted semantic standards for e-invoices, the necessary infrastructure is in place, pilots are ongoing, and challenges remain in promoting adoption among suppliers and further developing the e-invoicing provider market.