Postal Bank charges for SMS notification service of credit card, and the charging standard is 3 yuan/month. If the service is not enabled, you will only receive SMS reminders under certain circumstances.
If you are worried that your credit card will be consumed by others, I suggest you open SMS notification service to know the credit card consumption in real time. If you don't want to pay the SMS service fee, it is recommended to log in to the online bank of the Postal Savings Bank from time to time, check the credit card consumption record, and report the loss in time if you find that the consumption is abnormal.