EHF (Electronic Trading Format) is a Norwegian adaptation to a pan-European invoice format. It is used by central government, municipal and private enterprises for receiving invoices. All central government organisations (and an increasing number of private enterprises) require invoices to be in EHF format.
An EHF invoice is an electronic invoice which is sent directly from the sender's financial system to the recipient's corresponding system. As this happens automatically, you can rest assured that it will arrive at the right recipient quickly. In order to send EHF invoices, it is necessary to use an invoice system which supports this format.