It can be said that the delivery note has legal effect and can be used as evidence. First of all, it is clear that the customer's non-payment dispute belongs to the sales contract dispute. The delivery note has the customer's signature, which can be used as proof that the other party has received the goods, that you have delivered the goods to the other party, and that this business relationship is established. Moreover, the consignee also signed the bill of lading, indicating that the goods are complete and there is no quality objection. However, the debtor's signature on the bill of lading can only prove that the debtor has received the goods you sent, but it can't prove whether the other party has paid you for them. If the delivery note has the customer's autograph, it can prove that the customer has received the goods. However, if the customer argues that the payment has been made to you, and you have made other settlement actions, it will be very confusing. If the customer refuses to admit it, the court may decide against you. In this case, the odds are slim.

Legal basis: Article 579 of the Civil Code of People's Republic of China (PRC). If one party fails to pay the price or remuneration, the other party may require it to pay the price or remuneration.