Legal analysis: the financial personnel of the other party sign the enterprise statement and affix the special contract form, which has legal effect. The official seal of the other company and the consignee's signature on the receipt confirmation form is a civil legal act of the other company to admit that it has received the goods, and this certificate can be used as direct and effective evidence to recover the payment.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it. A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.