Shipping Certificate
An instrument used by futures exchanges as a negotiable commitment by an approved delivery facility to transfer the underlying commodity to the holder of the certificate under the prescribed terms.
Investopedia Commentary
A shipping certificate is unique because it doesn't necessarily require the approved facility to actually store the deliverable. The obligation can be met through current or future production of the commodity.
See also: Approved Delivery Facility, Commodity, Delivery Instrument, Underlying, Vault Receipt, Warehouse Receipt