Which statement is true about signing the certification?

• A. The certification must be signed by the shipper's attorney
• B. The certification may be signed by the shipper's agent
• C. The certification must be signed by a government official
• D. The certification must be signed by the shipper (by hand, typewriter, or other mechanical means)

Answer: (D)

The main idea here is who is responsible for the certification on the shipping paper and how that signature is provided. The shipper must sign the certification to take responsibility for ensuring the shipment meets all HazMat regulations—packaging, labeling, marking, and the proper classification. The signature serves as a formal, binding statement that the shipper stands behind the accuracy and compliance of the shipment.

Signing by the shipper can be done in any legitimate way, not just a handwritten signature. A signature produced by hand, a typewriter, or any other mechanical means (including stamps or digital forms that clearly identify the shipper) satisfies the requirement. This emphasizes accountability: the shipper alone is affirming that everything is properly prepared for transport.

The other options don’t fit because the certification isn’t required to be signed by a lawyer or a government official, and while someone acting on behalf of the shipper can sign if authorized, the fundamental requirement being tested is that the signer is the shipper.