Problem is paperwork is only as good as the seller is, anyone can make some quick paperwork
The bottom line is to buy from someone REPUTABLE that will stand by there animals.
BTW many big breeders who sell hets do not provide any paperwork does not mean the animal will not prove out
All my hets and possible hets came without any paperwork however I never had any doubt that the animals were the results of the described pairing, again the keyword is buying from someone reputable.