how can debit cards prevent credit card bundling? When you apply for a credit card, if you don't fill in the bundled debit card, it won't automatically bundle your other bank cards. Even if it is tied, there is no need to worry too much, because just take your ID card and go directly to the bank to untie it. Or call customer service and provide your verification code and your. Payment passwords can be untied. Mobile banking can also be operated.