What document is often required when shipping restricted materials?

The shipping manifest is a crucial document that details the contents of a shipment, especially when it involves restricted materials. It serves multiple purposes, including ensuring that all items are accounted for, indicating the nature of the materials being transported, and complying with regulations set by governmental agencies. When shipping restricted materials, it’s imperative to provide clear documentation to prevent legal issues, ensure safety, and facilitate customs clearance.

Other documents, such as an insurance policy, primarily focus on protecting the shipment against loss or damage rather than detailing the shipment's contents or compliance with legal regulations. A compliance certificate may be necessary in specific contexts but does not typically fulfill the role of a shipping manifest. Similarly, a labeling guide informs about how to label items correctly but does not provide the comprehensive overview of the shipment that a shipping manifest does. Therefore, the shipping manifest is the most relevant and required document for shipping restricted materials.