For those who don't know about this:
There is a quick, easy, and convenient way to see if the United States Postal Service money order you sent to make a purchase has been cashed. Just follow this link: https://tools.usps.com/money-orders.htm
You will be required to fill out three simple fields. You'll need to have the money order's serial number, the Post Office number where it was purchased, and the issued amount for the three fields. This information can be found on the money order as well as the "Customer's Receipt." Be sure to remove and keep this receipt. You may need it later. Finally, click the "View Status" button below the fields to see if the money order you sent has been cashed.