They will tell you very plainly. Some of the affiliates actually send you a totally and completely separate credit report
When your order your report from EQuifax and initiate and dispute you enter your zip code, if yours is handled by an affiliate they will give you the address and phone number to contact them. Same goes for TU, when you order your report online/mail it will tell you who to contact reagarding disputes, if yours is an affiliate it will give you name and address. I am not sure but Experian probably does the same thing but I don't know for sure.
Thank you Mom. I sincerely appreciate your input on this matter. It's probably a lot better than what I might have said. Have a nice one. catch you later.