Getting a GSD is a life changing experience and you want to rule out as many risks as possible. I would take my money and find a reliable breeder with a good reputation; one who titles his/her dogs, health checks, sound temperament etc.
And this breeder cannot manage his/her own breeding dogs.....
What you see in the first post of this thread aren't AKC papers, but the REGISTRATION FORM to apply to register the dog with AKC.
I think the way this works is when a litter is born, the breeder registers the litter with AKC, but individual registration is often left to the new owner. This saves the breeder from having to pay the registration fee.
If you want to check if the parents are registered, there is a dog lookup on the AKC website. You can use either the dog's name or registration number: Dog Search