Why not simply choose a broker (such as DKB) that offers advance withholding tax reduction? Once you've set it up, you no longer have all the hassle you mentioned.
@Khlmysee I have heard that DKB offers advance exemption, e.g. for France. I couldn't find any reliable information for Norway. Maybe you can help there. Other brokers such as comdirekt, Consors, S-broker or Diba do not offer this service. The question is also what does the service cost and is it worth it to me?
@Dividendenopi the "service" (which is only a one-off formality) only costs 30 euros to set up and is valid for 3 years. It definitely works for Norway, as I had it set up myself.
@Dividendenopi Have you ever asked ING about this? (Why they don't offer it) I have already done this once or twice (with reference to DKB, which offers it). If ING gets more and more inquiries about this, maybe they'll reconsider.
@Dividendenopi Yes, you're right! I've always been too lazy so far..... (But Norway / $EQNR ) I could really do it sometime. I think I can do it five years later.