Originally Posted by
party_boy

That makes absolutely no sense. NW, but credit to DL. Do you mean Fly NW, but credit CO?
DL/NW/CO are all code shared now (for about 3 years now) so I think they meant what they said, fly on NW metal but post to DL. I don't see the purpose of that since if you are flying NW metal as a DL elite you don't get the UG's but it is an option.