What is the required action regarding the original Shipper's Certification document for a dangerous goods shipment?

The original Shipper's Certification document for a dangerous goods shipment is crucial in ensuring that all regulations and safety protocols are followed. This document serves as a formal declaration by the shipper that the goods have been properly packaged, marked, and labeled according to the applicable regulations.

Retaining this document by the originating carrier is important because it enables the carrier to verify that the shipment complies with safety standards before it is transported. By keeping the certification, the carrier holds responsibility for the safe transport of the dangerous goods and can demonstrate compliance in the event of an inspection or inquiry.

The other options do not align with the established protocols for handling the Shipper's Certification. For example, while the shipper is responsible for preparing the document, it is not necessary for them to retain it once the shipment is processed. Similarly, forwarding it to the destination is not typically required because the document serves its primary purpose during the transport phase. Filing with customs is also not standard for this specific document, as customs documentation typically relates to trade compliance rather than the safety certification specific to dangerous goods.