1) Payment system 
eFaktura is a Norwegian electronic billing system issued by Bankenes Betalingssentral (BBS). The system involves both business-to-customer (B2C) systems, branded as eFaktura, and business-to-business (B2B) branded as eFaktura B2B. The system is built upon the bankgiro system used for online banking. Use of eFaktura require the customer to use an o...