@hopefulspeechie52 I had the same problem last year when I applied. If you are really unsure about this prof and want someone else you actually can call ORPAS and tell them and they will remove him from your references. One of my references were late last year and ORPAS told me that the schools will not know as they don't send the applications to the schools until late February. This being said, the process was a bit different last year as references where mailed in manually not via email so the process may have changed this year.