Never start off with the big guns. Try the soft approach at first. Something like, I've noticed this has been included on my CR as a duplicate and it's posting has caused problems with my ability to get credit. Would you please remove both postings.
You type it up and put it in your own words.
July 2013 score: EQ FICO 819, TU08 778, EX "806 lender pull 07/26/2013
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
Current scores after adding $81K in CLs and 2 new cars since July 2013
EQ:809 TU 777 EX 790 Now it's just garden time!
June 2017 update: All scores over 820, just pure gardening now.