How to track a money order without receipt?

Money orders are often thought of as "good as cash" by banks around the U.S. If you purchased your money order through the Post Office, Western Union, or your bank, each has ways of tracking the money order through various means. You should check with the institution to find out what is required. If you purchased your money order through a retailer such as a grocery store or Walmart with a debit card, they can track your money order after between three and five days.