Yes, you can mail money with USPS using a money order. Money orders are a safe and convenient way to send money through the mail. You can purchase a money order at your local post office, or at certain retail locations such as supermarkets and convenience stores. To mail a money order, simply fill out the required information, including the recipient’s name and address, and mail it using the appropriate postage. Keep in mind that there may be a fee for purchasing a money order, and that money orders are only for domestic mail, so you cannot use them to send money internationally.