Card Postal Code It is the zip code of the billing address attached to your credit card that you have registered with the credit card(s) in question. You could have more than one. You might have one billing address that you use for business, particularly if you travel a lot and don’t want mail or important packages shipped to or returned to your door step while no one is there you might like a UPS store ( they accept USPS, Fedex, DHL, UPS) and they inform you by email when packages are delivered there. You will have their physical address for the UPS store and box number. There is a charge but it provides peace of mind if you are out of town and another address for personal mail that could be your physical address ( where you reside) if you are lucky enough to have a mail slot where mail goes inside your house so it’s not left outside in a mailbox while you are at work or away. It’s up to you.
Whichever address you have chosen, you can easily find the postal code with query search on google for the physical address you wish to use for your credit card or go to the usps.com website and obtain the zip code from USPS if you have no need to use other services.
If you have already registered your address with cc company, call the number on the back of the card for customer service.and give them your zipcode .You can talk to the credit card company if you have any other questions. Just remember the owner if the credit card provides the zip code to the credit card company. They are not psychic. They alsom expect you to know your own zip code. This is why they ask YOU to confirm it.
There are 3 ways to do this: Card Postal Code
The one: check the zip code on your credit card billing address.
The two: search by Google or website (Link: United States ZIP Code ✉️) for the actual address of your credit card.
The three: you can ask by the credit card customer service phone.
Hope can help you.
For more information, you can read the blog. What is the relationship between credit score and zip code?