"We are investigating," said Maura Possley, a spokeswoman for Illinois Attorney General Lisa Madigan. "It's part of a multi-state investigation."
Jaclyn Falkowski, spokeswoman for Connecticut Attorney General George Jepsen, said that Connecticut is looking into the matter also.
Neither spokeswoman would say if other states were involved.
A spokesman for Experian declined comment.
(Reporting by Jim Finkle. Editing by Richard Valdmanis)