a) When you receive the parcel, please check if the package is damaged, whether the products are correct. If there are any problems mentioned above, please refuse to sign for the parcel and contact us in time. b) If you encounter the condition that the parcel must be signed before it can be checked. Please sign for and open the parcel in front of the courier. After checking, if there is no problem then you can give the receipt to the courier. If there is any problem, please give feedback to the courier and contact us immediately. (It is suggested you take pictures of the package box, product boxes, products, waybill, etc. And pictures should be clear and easy to identify)