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Said to Contain. In shipping, a term in which a carrier (shipper) accepts packages for transport but does not verify their contents. Depending on the international convention used, a carrier accepting goods on an STC basis may only be legally liable for the number of packages, rather than the value of the contents. This is especially important in the event of a lawsuit or insurance claim. STC is also called shipper's load and carry (SL&C) or said to weigh (STW).