Why are some packages overdue and not reminded to pick them up?

The phenomenon of short message sending delay caused by signal problem is not ruled out.

If the single number shows that you have been waiting for the pickup, you must contact the merchant as soon as possible to prevent being cheated. Another possibility is that the courier was sent back as a difficult one.

After the courier arrives at the rookie station, the staff will inform the customer to pick up the piece by SMS, and tell the customer the number of the courier at the rookie station, and pick up the courier at the rookie station by SMS notification number.