Directive 2014/55/EU on electronic invoicing in public procurement applies to all Member States of the EU. It defines a common standard for e-invoices to reduce the complexity and legal uncertainty around e-invoicing and make cross-border trade relations easier. The implementation of the common standard is not just a recommendation. Beginning 18 April 2019, the deadline for Member States to implement the Directive, all EU public sector contracting authorities are required to receive and process e-invoices that comply with the standard.