Hi @Jeff_Poul_
Certificate of completion is given on all the paid courses, and not on the free courses (as per the latest update). If your friend has enrolled in a course which is free course (prized at $0), he will not get the certificate. But, if it's a paid course (available on udemy platform for purchase) and your friend has got it for free because he used the coupon, he will get the certificate of completion.
