I tried looking up lots of ways to do this. Most places don't allow customers to buy money orders with gift cards.Thankfully, there are a few places that accept gift cards, but there are restrictions. Decide on the money order amount. Pay with your credit card online: Access the SDU website. Select "Parent Paying Support" and follow the prompts to pay with your Mastercard or Visa. How do I apply for financial aid and what forms should I submit? No credit cards accepted. If the money order was paid for with a Visa card, yes it is traceable.