Stolen Idea?
This film's premise is identical with a story I was showing to producers in London, England in 2009 and 2010. In the sense that anything is possible, I suppose it's possible that someone came up with the same exact idea independently. But seriously, the difference in the basic premise is that in my story the girls are called Annie and Kristina.
In the end I figured the story wouldn't make a very good movie, so I never finished the script, but I do have the synopsis, a short film script and an unfinished 50-page script from 2009 featuring basically the same exact premise.
My short script is completely about Kristina taking over the identity of her less troubled twin sister Annie, after they get into a car crash and Annie dies.
The full length script does have several other story lines as well, but it does feature that same premise as an integral part.
I never got a penny or even a "thanks for the free idea."
EDITED: I went over my old files to see what exactly I could find related to this story. Added details about the full length script.