First: when the courier delivers the courier, first make sure that the content of the courier and the address of the courier are the addresses of your relatives or friends. If so, it's your courier.

Second: If you can't confirm the content and who sent it to you. You can also sign for it first, and then confirm the product after opening the courier. If it doesn't work, it may be that your information has been known by others, and the seller who opened Taobao used your information to swipe the bill.

Third: Now some people send things to many people in the form of cash on delivery. Don't sign for the express at this time. The courier will ask you to pay before signing for the courier.