Originally Posted by werldporks
You don't need to phone to have the Status change recognised on the booking. Simply entering a "new" Worldperks number on your reservation via NWA site ( where "new" = the same number re-entered ) does the same job. That's the procedure that I carried out on all my future itineraries.
it worked too.
I'd always verify it on the boarding pass the first time I change status levels regardless of this tidbit, just to be safe. I usually fly long segments at once, so if I miss some bonus miles or whatever due to an improper status showing up, I might be a bit peeved.