Zip code mismatch during transaction

Each card will have their own billing address and subsequent zip code. Please follow this path,

iPhone > Wallet app > tap card > More Button (3 dots in circle in upper right corner of screen) > Card Details > Billing Address > edit information

That will resolve Tap-To-Pay use of Apple Pay. If using a merchant app or website you should edit card, but also your account on merchant app and website. Lastly, edit the >ME< card in Apple Contacts app. Make sure zip code is correct and each address is labeled properly.

I just had the same problem. And to answer Jeff when you’re entering your card info some places ask for your billing zip code. Is there somewhere in the wallet you can set that up?

So, what exactly are you doing? Zip codes are used all the time in regard to banking and other financial services.