How do you know if your supplement is complete? Do schools send a message to you after you complete your supplement or the applicant has to keep track of every thing by himself/herself?
Typically schools will send you an e-mail or give you a phone call (Nova gives phone calls) confirming that they have received everything. It might take a few days for them to get back to you though. If you sent it in a while ago, it doesn't hurt to give them a call and make sure everything was received.