1. Fill in the payee's name. Put the payee's name on the line labeled "Pay to the order of" or "Pay to.You cannot pay with a credit card. Fill out the money order at the counter with a retail associate. 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. Visit fl.smartchildsupport. VALID FORMS OF PAYMENT — Cash, Cashier's Check, Money Order, or American Express, Discover, MasterCard, or Visa credit cards. (We cannot accept postal money orders or payments through Western Union). The applicant must use their own credit card and their billing address in order to have their requests processed.