What document provides specifications for vendor-made fiberboard boxes?

The correct answer is the box maker's certificate, as this document specifically outlines the specifications and standards that must be met for vendor-made fiberboard boxes. It serves as a formal assurance from the manufacturer regarding the quality, structure, and compliance of the boxes with industry standards. This is crucial for ensuring that the containers are suitable for their intended purpose, especially in preserving and protecting sensitive items during shipping and storage.

The product manual typically focuses on instructions and guidance regarding the use or assembly of a product rather than the specifications of the packaging materials themselves. A shipping receipt primarily details the specifics of the transaction, such as the items shipped and their costs, without providing information on packaging specifications. An inventory list is used to track the items in stock or within a specific shipment and does not include information about the boxes used for storage or transport. This makes the box maker's certificate the appropriate document relating to the specifications for fiberboard boxes.