Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be the zip code associated with your billing address.

Discover what a billing ZIP code is and why it's important for credit card transactions. Learn when it's required and how to find your billing ZIP code.

Type in the details of the debit card you wish to add including card number, expiration date, CVV, country, and billing zip code. Add in debit card details. Stephanie Lin/Business Insider ...