An accurate stud book is essential for breeders who carefully plan breeding and are diligent in the selection of quality brood stock. 
Without a true pedigree behind the stock, there would be no way to predict what type of offspring will be produced and/or assure that quality dogs would be produced for the future.
Every registration office throughout time has had to rely on the integrity of the breeders who submit paperwork into the office for the accuracy of the stud book.  This is true of equine, bovine and canine registries alike.
Having an animal "REGISTERED" is a stamp of approval from the Registration Office that the breeder has fulfilled the requirements in record keeping, transferring ownership's etc. and the pedigree can be deemed accurate.
If a registry is strictly "in it for the money and has little or NO requirements, and any dog rescued from the pound, stolen or it "looks like a pit bull" on visual inspection can be registered for a fee, then having a "REGISTERED'' dog with that organization means nothing! We want your registration to mean something and you can be sure that when you register with the APBT ON LINE CERTIFICATE., your registration will!