Do we need to OFAC sanction list?

OFAC is a sanction list not yet "included" in Norwegian law. However, the list is often a business related demand for companies trading with or in USA. The list contains companies and persons not allowed to do business in USA. If you were to buy a property in USA and use a Norwegian realtor, the realtor may have demands to screen towards OFAC. This is obviously more usual for banks that assists transactions to and from USA.