1) Denmark has had great success with its NemHandel e-invoicing system, exchanging over 70 million e-invoices since 2005 and saving €500 million.
2) NemHandel provides an open infrastructure for businesses to easily and securely exchange e-documents like invoices according to international standards.
3) Key aspects of NemHandel include an online registry for finding trading partners, support for standards like UBL 2.0, open-source software, and a web portal for generating invoices.