Cal. Civ. Code § 2142

If a consignee voluntarily receives freight at a place short of the one appointed for delivery, the carrier is entitled to a just proportion of the freightage, according to distance. If the carrier, being ready and willing, offers to complete the transit, he is entitled to the full freightage. If he does not thus offer completion, and the consignee receives the freight only from necessity, the carrier is not entitled to any freightage.