1. You can directly call the customer service phone of the credit card (debit card) issuer to apply for cancellation of the supplementary card, and follow the voice reminder.
2. You can also apply for cancellation of the supplementary card of the credit card (debit card) at the business outlet of the credit card (debit card) issuing bank, and follow the reminder of the branch staff;
3. Log in to the mobile banking APP or online banking of the issuing bank and find the option to cancel the credit card (debit card). You can also cancel the supplementary card.
If you are not familiar with the credit card (debit card) cancellation process, it is recommended to cancel the account directly at the bank outlet.