For ABC, CCB and BOC, if the identity information has not changed, there is no need to fax information; If key information such as ID number and name changes, it needs to be updated at the outlets. China Merchants Bank needs a fax with unchanged information, and the note "ID card renewal period" is handled by a special person; If there is any change, you need to go to the bank outlet to handle it, and you need to provide a certificate of identity information change issued by the public security organ. If you don't update your ID card information, some transactions that require real-name authentication will not be possible.