My question involves business law in the state of: Illinois

I want to put web based courses online (for example data mining).
Once the user visit all needed pages and complete quiz I want to provide the ability to print confirmation, that such course or courses have been taken. I want it make as certificate of completion of course/s from given website.
My question is: issueing such paper (certificate) is legal? Are there any rules that I have to follow (except copyright) and/or any requirements for registration?
Thanks.