Fill in the recipient and your address; for bills, include an account number; sign it; keep proof of payment. Decide on the money order amount.When filling out a money order, you'll need some basic information, such as the recipient's name and your address. 1. Fill in the payee's name. Put the payee's name on the line labeled "Pay to the order of" or "Pay to. Know how and who you'll pay: Be prepared with cash or a debit card, the name of the payee and the amount you want to send. There'll also be a field for your signature, usually called purchaser's signature you must sign this, or the money order won't be valid. Address the money order in the pay to line. It provides a reliable way to transfer funds from one person to the next. Fill it out at the counter with the clerk.