E-invoices

Last updated: 28 May 2025

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An e-invoice is an invoice that the recipient can manage directly in their business system. In other words, it is not the same as sending a PDF invoice attached to an email.

In Opter, it is possible to use e-invoices for various customers. This requires Opter to be able to export the invoices in a format that the receiver can use. Contact for more information.

Peppol

Peppol is an EU standard for e-invoices (also used in Norway, where it is known as EHF, or Elektronisk Handelsformat). Peppol consists of a network of operators known as VAN operators. To send a Peppol invoice, you must send it to a VAN operator. VAN operators are interconnected, so the VAN operator to whom you send the invoice always knows which VAN operator the invoice recipient uses, and forwards the invoice to that operator. Opter is not a VAN operator, so you will need a contract with one. In Norway, the most common VAN operators are Addoro/21grams and efacto; in Sweden, they are Addoro/21grams and Inexchange; in Denmark, Sproom; and in Finland, Maventa. Opter can send Peppol invoices to most VAN operators, although not, for example, Fortnox and Visma, as invoice processing is an integrated part of those accounting systems.

When an invoice is created in Opter, the invoice’s basic data is converted to Peppol format and sent to your VAN operator. The VAN operator checks that the contents of the invoice comply with the Peppol regulations. If the invoice is approved, it is forwarded to the recipient’s VAN operator, who then forwards it to the recipient. If it is not approved, you will be notified. VAN operators have different ways of providing information about the fault. In some cases, an error message may appear in Opter; in others, you may need to log in to the VAN operator’s portal. The errors may have simple causes, such as the customer being invoiced not having a corporate ID number, but they may also be more complex. If you need help interpreting the error messages, can help you with that.

Country

Format

VAN operators

More information

Sweden

  • Peppol BIS Billing 3.0

  • Svefaktura

  • Addoro/21Grams

  • Inexchange

  • Pagero

  • TIE Kinetix

  • Basware

  • OpusCapita

  • Tietoevry

The Swedish Agency for Digital Government, DIGG: https://www.digg.se/

Norway

  • Peppol BIS Billing 3.0

  • EHF 3.0

 

  • Addoro/21Grams

  • efacto

  • Pagero

  • Compello

  • Logiq

Directorate for Administration and Financial Management: https://dfo.no/

Denmark

  • Peppol BIS Billing 3.0

  • OIOUBL

  • NemHandel

  • Sproom

  • Inexchange

  • Qvalia

  • TrueCommerce

  • Pagero

Danish Business Authority: https://erhvervsstyrelsen.dk/

Finland

  • Peppol BIS Billing 3.0

  • Finvoice

  • TEAPPSXML

  • Maventa

  • Heeros

  • Qvalia

  • Posti Messaging Oy

  • Apix Messaging Oy

The Swedish National Financial Management Authority: https://www.statsskuld.fi/

Estonia

  • Peppol BIS Billing 3.0

  • EstEHF

  • Inheritance Centre

  • Bilberry

  • Finbite

  • Telema

  • Unifiedpost

  • CostPocket

Centre of Registers and Information Systems https://www.rik.ee/

See also