Generally, all schools, colleges, universities, and other institutes of learning require pre payment of their fees. In many cases, a face-to-face course will only open when sufficient enrollments to cover costs have been made and paid. If you are paying by credit card whether online or not, you will need neither invoice nor receipt. If you are paying by cheque, the clearance through your bank will be your receipt. If you are paying cash over the counter, I'm sure they will issue a receipt. As holder of a first degree in Business Studies, I can assure you that an invoice is not a customary prerequisite, by all means, for conducting business. As I mentioned before, Saxon Court is a trusted course provider.