How to cancel the health certificate after mailing it?

If you choose to mail your health certificate but want to cancel it, you can refer to the following information:

1. If the courier is still in the city, you can cancel the mailing.

2. If the express mail has been sent, you can contact the customer service of the courier company and ask to cancel the express delivery.

3. If the express mail has arrived at the destination, you can contact the customer service of the courier company and ask to return the express mail to the sender.

If you need more detailed information, it is recommended to call the customer service phone of the relevant courier company for consultation.