What exactly is a billing ZIP code, and why do credit cards need it? Billing ZIP codes are a crucial aspect of credit card security, helping to prevent fraud and ensure authorized transactions.

For some credit card purchases in Canada, a postal code is required as a security measure. If using a credit card in the U.S., you may need to use a ZIP code instead.

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. It ...

Why are zip codes and postal codes important when it comes to credit card transactions and when do they overlap for Canadian credit card users?