The best option if you do not want to use FACTS is to pay in full through GSMU at time of registration.  Alternatively, we can set up an artificial “Balance Due – $x.xx” course for you in GSMU, but that comes with a number of unpleasant side-effects (including our time setting it up and our time again calming you down when GSMU sends its automatic reminder about the “class” that is about to start, making you think we did not get your payment).  Note also that FACTS does include an “invoice” option that allows you to pay them directly by phone or US postal mail.