What is the maximum amount for a single domestic money order?

The maximum amount for a single domestic money order is indeed $1,000. This limit is established by the United States Postal Service to help manage risks such as fraud and to ensure that money orders are used as intended, primarily for secure transactions. Keeping the maximum value at this amount also facilitates easier processing and handling by both the Postal Service and the recipients, ensuring that transactions remain manageable and within regulatory guidelines.

In this context, the options that propose lower amounts do not reflect the current maximum threshold set by the USPS. As the regulations were updated, $1,000 was established as the maximum limit, thereby making it the correct choice for this question.