Signature authentication in the bank is to protect the property safety of depositors. If the business involves signature authentication, signature confirmation is required.

If you need to check the debit card number, you can bring your valid ID card to the business hall of Postal Savings Bank to check the bank card number. If personal online banking is enabled in the account, you can log in to the online banking to check the card number; You can't check the account card number through customer service phone.