What is the cancellation or immediate cancellation of the short message fee for postal currency cards due in 30 yuan?

Cancel the 30 yuan when deducting the SMS fee, because you may have an option when you apply for a card, that is, if the amount changes, you will inform us by SMS. Generally, if the 30 yuan is not cancelled for one year, it will be renewed automatically after the expiration, and the fee will be deducted before use. It should be better to cancel when it expires.