I received a letter from FTB this week... after reading some of the posts I was in two minds whether to call them or not. I'm glad I decided to make the call as once I confirmed who I was they advised that they were tracing me on behalf of a pension fund that was tracking down lost members. It just so happened that the fund was for a company I worked for in the 90's and I didn't even know I was a member of their pension. They also advised that now they have confirmed who I am and where I live they will inform the pension fund so the fund can contact me with my pension details etc.