After getting reports that people were getting invalid CD keys on the back of their DoW Gold Edition manuals, Buggo from Relic asked THQ about this issue.
THQ had this to say:
The Dawn of Way Gold Pack CD key should only be 16 characters long, in four banks of four. If your CD key is 20 characters long, you have a mis-printed manual.
Please post your faulty Dawn of War manual, along with a covering letter and return address to:
Dawn of War Replacement Manual,
THQ UK, Dukes Court,
Duke Street,
Woking
GU21 5BHTHQ will then issue you a replacement manual within 7 days.