EDIT: Forgot to add - you can register a ferret - or even a skunk - with ANY of the above mentioned kennel clubs. They ALL work on the honor system. EVERY SINGLE ONE OF THEM. So don't think ADBA/UKC papers automatically assure quality & purity of bloodline & CKC papers don't. You can get a paper hung dog anywhere. Paper hanging is as easy as pie & several of the best ADBA breeders have done it. Honesty & quality come from the breeder, not the papers they give you.