I'm going to show you how to quickly fill out this post office money order to use to pay somebody. General Recommendations.If you would like to use a check, make sure it has your name and address pre-printed in the top left corner. I'm gonna give you some brief information on how to fill out a money order. To fill out a money order you need to first fill out the who the payee is, the purchasers information and sign it. Fill in the recipient's name. When completing the form, note the following: 1. You must have the full names and street addresses for all parties. Go to the court's web-site and fill out the forms. The first thing to do when you receive a money order is to review the document and make sure the money order was filled out correctly.