I'm new at this, but I learned a lesson today that I thought I'd post for other newbies. I filed a dispute with TU, and the next day, faxed a letter from the orig. creditor which supported one of the items in dispute. Got a letter from TU saying, you submitted additional info which gives us an extra 15 days to investigate your disputes. One day. I faxed it one day later on one item, and they get 15 extra days on ALL the disputes. Won't make that mistake again.