When travelling from and returning to Norway with an expensive item, it is advantageous to be able to document that the item was in your possession when you left Norway. This may by documented with an identification certificate.
You should obtain an identification certificate for expensive items. If you have an identification certificate that proves that the items have been exported from Norway, you may reimport the items without paying duties or taxes.
The certificate may also be used for subsequent travel abroad if you are taking the same items.
Download the identification certificate (Norwegian)
You may fill it in in advance and print it. You must bring the item to Norwegian Customs in order to certify the identification certificate before travelling.