Tesla will be assigning you two numbers. A Reservation Number (RN) and a Reservation Sequence Number (RSN). The Reservation Number (RN) is a number which identifies you as a customer. This number should be kept private and not shared. The second number they will assign you will be the Reservation Sequence Number. It may be a while before you see your Reservation Sequence Number. This represents your place in line and there is no risk in sharing this number with others. The Model3Tracker.info will become active probably late tonight. Once you get your RSN you should update the tracker with yout RSN. I am co-administrator of the Model3Tracker.info site so if you have question about the system send me a private message.