Annual Business Registration Requested payment for registration of business with State of California Los Angeles, California

I received an "Official looking" letter with the State of California seal on the top left corner.  It asked me to pay $218.00 by October 15, 2012 for my required business' Annual Business Registration in California.  The letter cited a number of Business Codes, including penalties for failure to pay.  I noted the document appeared to be a "photocopy," rather than a clean California Seal and document.  Furthermore, the only address listed was a P.O. Box in Los Angeles.  I check the web and found a "RIPOFF REPORT."   I had already written my check and was preparing to mail my payment.  THANK YOU!