Signing for express delivery means that the recipient has accepted the product and confirmed that the final process of express delivery has been completed. If problems are found later, there are two ways to solve them.

1, contact the courier who delivered the goods to you, ask him to identify the damage of the products for you, indicate the damage of the products after signing, and then contact the seller to exchange the goods.

2. Contact the seller directly and ask the seller to exchange the goods for you.

In the above situation, we should calmly contact all parties and strive for the right to replace products.