What must accompany any HAZMAT package sent through USPS?

When shipping hazardous materials (HAZMAT) through USPS, it is essential that the package is accompanied by proper documentation. This documentation ensures that the carrier and the recipient are fully aware of the nature of the hazardous material being shipped, the relevant regulations, and any safety precautions that need to be followed. Proper documentation typically includes specific labels and forms that comply with federal regulations, indicating the contents and ensuring safe handling.

This requirement is critical for maintaining safety standards and regulatory compliance, as HAZMAT materials can pose significant risks during transportation. The documentation helps to inform postal workers and emergency responders about the risks associated with the package, which is crucial in the event of an incident. This focus on safety and compliance is why proper documentation is a mandatory requirement for shipping HAZMAT through USPS.