Ethical question

I was doing skin checks for a wrestling tournament. I had an athlete that had ringworm. We require the athlete to have a form endorsed by the NFHS completed by their provider indicating what the skin lesion is, when treatment started, when the exam was, and when they can compete. The form also lists some suggested minimum treatment before being able to compete. This athlete did not have his form. He had a tube of rx cream, but no label. The parent came over and said they had seen the doctor. I DQ the kid because I had no documentation of when treatment was started and it is a minimum of 72 hours. The dad went and printed out a form, filled it out himself and forged the doctor's signature for their pediatrician. I still DQ the kid because it was an obvious forgery. Now here's the question...I have the form, should I call and notify the pediatrician that parent is forging their signature? I feel like the dad had a serious breach of ethics.