Investigation of the Tax Administration’s administrative handling of the Transocean-case

Grette was engaged by the department for Internal Audit in the Tax Administration to carry out an investigation of the Tax Administration’s administrative handling of the so-called Transocean case, Norway’s largest tax evasion case to date, with alleged tax evasion of over NOK 11 billion. The case was processed by the tax administration, Økokrim (Norwegian National Authority for Investigation and Prosecution of Economic and Environmental Crime) and the courts from 2001 to 2017. Grette’s investigation was carried out in 2017 and 2018.

The investigation mapped and assessed the tax administration’s ongoing work related to investigations and duty of investigation, processing of requests for access, information sharing and duty of confidentiality, reasons for decisions, cooperation between government agencies, liability for administrative errors and more. The investigation is unique in Norwegian context and put an end to an extraordinary and controversial tax case.