You have bought a purebred dog but he has no papers. Where do you go to get his purebred papers?

No, probably not. If the sire and dam were not already registered with papers, then there is no way you can prove your dog is a purebred. Usually purebred registration is regulated by the breeder when the puppies are born as a part of the contract of sale, and it is normal to require that the purebred puppies, if registered, include the breeding kennel's name in the official registration name. It is also normal to require that the puppies be spayed/neutered, because the breeder would normally get a share in any profits from any breeding you do with your puppy.

All of this assumes that the breeder is a reputable, AKC breeder, that cares for the dogs and where the puppies are "kitchen-raised," etc. If you got your dog from a puppy mill or a large-scale breeding operation, it is likely that your dog actually is not a purebred--particularly if the purebred paperwork was not handled as a part of sale when you got the puppy.