CampusCash CampusCash is the key to all your purchases and campus services at USD. It is a prepaid, declining balance account managed through your USD ID card. To activate your account, all you need to do is make a deposit in any amount you choose. Within minutes you can use your ID everywhere CampusCash is accepted. Purchases are deducted from your account, and your remaining balance is instantly displayed. CampusCash is the safest, fastest, and easiest way to obtain the things you need.