What payment methods can you use to buy a money order?

When purchasing a money order, it is important to note the acceptable payment methods offered by the USPS. The correct choice highlights that you can pay using cash, debit cards, and traveler's checks, but it specifies a requirement that the traveler's checks must exceed 50% of the money order's value. This is relevant because the USPS has specific policies regarding payment methods, particularly with checks, to mitigate risks associated with fraud and ensure the transaction is secure and efficient.

Cash is universally accepted and allows immediate payment, while debit cards provide a direct withdrawal from the purchaser's bank account, making it a convenient option as well. Traveler's checks are also accepted under certain conditions as they are considered secure; however, the limitation on their value helps to prevent potential issues that can arise from using checks that don't clear adequately.

In contrast to the other options, which may suggest invalid combinations or limits of acceptable payments, the correct choice adheres closely to USPS policy governing payment methods for money orders. Thus, understanding these methods not only helps in making a purchase but also reflects the importance of policy compliance and security measures in postal transactions.