What does SF Express mean that the delivery is unsuccessful due to the rejection of the receiving customer? I am the seller, and the buyer requires SF Express. Thank you.

According to the information you provided, SF Express shows that "the delivery was unsuccessful due to the rejection of the receiving customer", which means that the buyer requested to send SF Express, but in the end, the delivery could not be successful due to the rejection of the recipient. There may be the following situations:

1. The buyer changed his mind and decided not to accept express delivery, so he refused.

2. The buyer is not at home and can't receive the courier, which leads to rejection.

The buyer may have doubts about the goods or find that there is something wrong with the goods, so he refuses to accept the goods.

4. The buyer may not communicate with you clearly, resulting in sending the wrong address or not receiving the courier.

In view of the above situation, you can try the following steps to solve the problem:

1. Contact SF customer service to confirm the details of the package, such as whether the package has been returned and whether it needs to be re-delivered.

2. Contact the buyer to confirm the reason for rejection and whether it is necessary to re-ship. If it is because of the address problem, you can negotiate with the buyer for a suitable address for re-delivery.

3. If you can't contact the buyer or the other party is unwilling to reschedule the delivery time, you can wait for the courier company to handle it. The courier company may try to deliver the package again or return it to you.

It should be noted that no matter what causes the rejection, you should respect the buyer's decision and try to solve the problem.