Unfortunately false pedigrees are fairly common which is why it is important for people to ask their breeder to see an official pedigree for the parents before they purchase a puppy. I heard of someone who purchased a black Neapolitan Mastiff puppy and the pedigree they were given for that puppy listed two blue dogs as the parents, which would be impossible. In the Neapolitan Mastiff, two blue dogs cannot produce a black puppy. In order to produce black, one parent must be black. So in that case, the pedigree was definitely a fake.