If you don't sign or your family and friends don't sign, you can directly seek compensation from Shentong. Even if you don't receive the goods at all, there is no insurance and the compensation is not much. It's probably enough for your phone bill. You can lodge a claim. If they don't handle it, you can go to the Postal Administration for complaint handling or the consumer hotline. He asked you to write the receipt certificate. This must not be written. This is a trap. Don't say I don't mention you.