Can you get a money order online? by but they're easily worked around. For example, the amount can't exceed $1,000, but you can buy more than one at a time. So, if you need to send $5,000, just purchase five money orders worth a grand apiece. The United States Postal Service charges $1.50 per order if going to a customer in the U.S People can now buy postal orders online to file RTI applications after payment of fee through a postal department website. Earlier this facility was only available to Indian citizens living abroad. While credit card issuers will allow you to purchase a money order, many money order seller do not accept credit cards as a form of payment. That includes Walmart and the United States Postal Services. Western Union and 7-Eleven are currently two places that you can buy a money order with a credit card.