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 ...

In one high-profile case, the home furnishings and cookware chain Williams-Sonoma matched names from its credit card sales and ZIP codes with a database to obtain addresses and other information ...

Reporting from San Francisco — In a case watched closely by merchants, the state Supreme Court ruled unanimously that California retailers may no longer collect ZIP Codes from credit card ...

Closely guard your credit card security code unless you are certain that a legitimate business needs it – and only if you initiate a transaction.

Credit card companies and others involved in the process say the ZIP code is not kept or used for marketing purposes in these self-service gas station operations.