One only needs to look and investigate, there is plenty of proof, plenty of info out there on scam registries as they are called. These registires are ones put together by Puppy Mills and others who are unable to register their dogs with a legit registry. Info on these types of registries abounds. In essence the papers from these types aren't worth the paper they are written on..one could make their own registration certificate on line themselves and have it worth just as much.
As far as anything legally to stop them...won't happen..people are free to start their own groups, registries,etc as they see fit, call it anything and market it without being in breech of the law...while these registries take money & advertise their services they do indeed give the person that paid the money what they advertise....a piece of paper with the dogs name, etc on it.. they lived up to their end as bogus as it may be.