The name of one of the twin sisters played by Sarah Michelle Gellar in RINGER has had a name change. Originally, the rich sister was Siobhan Marx. That name has been altered slightly to Siobhan Martin. Below is evidence of that in a screenshot from the RINGER trailer.
Note that Gellar’s information is used on the license (birthdate, eye colour, height).
And we know Siobhan’s address now. It is 626 Park Ave. Ste. 400, New York, NY.