Secondly, CIF is a typical "symbolic delivery", that is, the seller with a single delivery, the buyer with a single payment, as long as the seller as scheduled to the buyer to submit a full set of qualified documents under the contract, even if the goods are damaged or lost in transit, the buyer must fulfill the payment of the Yiwu, but the buyer can with the bill of lading to the shipping side or with the insurance policy to the insurance company to request a claim. On the contrary, if the seller submitted documents do not meet the requirements, even if the goods arrived at the destination intact, the buyer still has the right to refuse payment. Therefore, the seller in the question can ask the buyer to pay unconditionally.