When filling out a money order, you'll need some basic information, such as the recipient's name and your address. Fill out your money order using a black or blue pen and print clearly.Because money orders are prepaid, you'll need to pay for yours upfront. Fill in the recipient's name. You typically can't buy a money order with a credit card. Instead, you'll need to use cash or a debit card that takes funds directly from your bank account. You can now only use cash or debit card to buy a money order at 7Eleven. You cannot pay with a credit card. Fill out the money order at the counter with a retail associate.