I received the express message, but I can't find it.

In this case, there are only two possibilities: one is to get it from the local office, and the other is that our own salesman sent the parts and missed the scanning, but in this case, even if there is no scanning, at least the parts will be scanned. Even if it hasn't been scanned, you can usually find it by looking at the address. I won't say I can't find it. Another possibility is that you used an expired noodle list and forgot to change it. This will happen. That is to say, when the courier picks up the piece, the customer uses the face sheet from a long time ago (the courier company has no record of this face sheet), which is the expired face sheet. When the operator took it back to the company, he was careless and didn't change the face sheet. In this case, the scanner usually cannot recognize the bar code, so there is no process of moving the goods. If the courier company receives the package, if the package is delivered to the customer, it will not be able to record the receipt. In that case, there will be no record on the internet. But if the mailing company checks, I mean by address. Generally, ask the mailing clerk, and they will also have an impression of when it was sent and what it was sent. I'm talking about the big picture. As you said, this possibility is rare. If you are sure that you are not using the old menu, there is generally no such possibility. Because generally, even if the sender company has no delivery record, the transit company will have a transit record. So if you are a seller, this kind of worry is completely unnecessary. If the express mail you sent doesn't go through the process or something, you can directly ask the sending company for compensation.