Answer by  
                                                                                          icanoutfishyou (1148)
                                                            
                          
                          
                                                          Carfax or any other service like it is essentially a VIN report.  They use the VIN to record instances out of the ordinary to the vehicle record, which can be accessed nationwide.  Yes, VIN number is redundant; there are people who refer to it as just VIN.