I received the courier inexplicably, and it was cash on delivery. What happened?

If you are sure it is not yours, don't sign for it.

Don't pay.

Now some people on the internet will use this express delivery of cash on delivery to fool. I gave the money and found it useless. I didn't buy it myself. Refund is impossible. And the amount is relatively small, which is not easy to handle.

So if you're sure it's not yours, or if you ask no one to buy it, don't sign for it.