Which of the following is a method to ensure that a money order is valid?

Ensuring there is no discoloration around the dollar amounts is a valid method to verify a money order. This discoloration can indicate that the money order has been altered or tampered with, potentially indicating fraud. Authentic money orders are typically printed with consistent color and quality, and any signs of discoloration or changes around critical areas, such as the dollar amounts, warrant a closer examination. By verifying that the dollar amounts do not show such discoloration, you can help confirm the legitimacy of the money order.

The other options do not provide reliable criteria for validating a money order. Checking the color of the paper, for instance, may not be a definitive indicator of authenticity since multiple money orders can use the same color paper. Verifying an amount exceeding $1,000 may not necessarily indicate a money order's validity; some money orders can be issued for larger amounts without issues. Reading the serial number aloud is not a recognized verification method since it does not confirm the money order's authenticity in a tangible, verifiable manner; instead, it is more effective to check the serial number against issuing records for legitimacy.