How to cancel short message service for postal green card?

Hello, if you mean the SMS notification service for account change, you can take your ID card, bank card or passbook to the counter of the Postal Savings Bank in the province where you opened the account to cancel it. You can also edit the short message "QX" and send it to 1 1 185 to cancel the service; Some provinces and cities support calling local 1 1 185 to cancel; I hope my answer is helpful to you.