1. Abnormal time

After the merchant uploads the invoice number, the parcel tracking information updated by the courier company is earlier than the time when the user places an order for payment (the time of the first logistics information recorded by the courier company system is compared with the time when the consumer places an order for payment);

2. Sign in different places.

After the merchant uploads the invoice number, the delivery location updated by the courier company is inconsistent with the delivery location of the user (check whether the delivery location recorded by the courier company system is consistent with the delivery address reserved by the consumer);

If the logistics is abnormal, first check whether the courier number is correct, and then check whether the courier company is correct, which is also the cause of the abnormality.