Responsibility marks and hallmarks
Anyone who produces and/or sells products made from gold, silver or platinum stamped with a fineness (e.g. 'S925' for silver) must stamp the product with a hallmark.
A sponsor's mark shows who is the producer or importer, and makes it possible to identify who made the product, e.g. a particular goldsmith. Applications for hallmarks must be submitted electronically to the Norwegian Industrial Property Office via Altinn. You must pay an application fee before your application can be processed; see the Norwegian Industrial Property Office's price list.
If you import goods made of precious metals from an EU or EEA country, and the items are already legally stamped with a mark that cannot be confused with a Norwegian hallmark, you do not need to apply for registration of a hallmark in Norway.
The Norwegian Industrial Property Office – Responsibility marks and hallmarks
The Precious Metals Act on responsibility marks (in Norwegian only)
Regulations on Precious Metals, etc. (in Norwegian only)
Regulations on the Registration of Responsibility Marks (in Norwegian only)