IB to ESA migration

I filled in an IB50 at the end of November 2010, and passed. I am sure I read somewhere on this site or from an email I received from B&W that if you filled in an IB50 recently you would not have to fill in the questionnaire being sent out in April 2011 to IB50 claimants, can someone point me to the thread as I cannot find it or clarify.

thanks

Hi, unfortunately, everybody on IB who are working age will have to fill out an ESA50 if they are sent one.

Best wishes,
Rachel

thanks for the replies, my new date on the letter I received after checking is November 2013