I received mine and signed it and sent it back and thats all there was to it. DMV doesnt require a doctors signsture on this form just where your health care is and the doctors name.
Oh there is no driving test for an endorcement on a class "C"
http://i24.tinypic.com/331qan7.jpg
Look at the last sentance in section 2 of required medical report, that is all I filled out for DMV