Top 10 Best Money Orders Near San Antonio, Texas ; 1. Fill in the recipient's name.Go to any Post Office location. Take cash, a debit card, or a traveler's check. We offer cash equivalents that can help you travel or mail money safely. How to fill out a money order. Fill out a money order form in 5 simple steps: Find a location. A money order is a form of prepaid payment that's a safe alternative to cash or checks. You specify who will receive the money order.