How do I accept credit cards with a foreign postal code? E.g. 3040 for a customer in Australia

Thanks for reaching out in the Community, John. I’m here to share some information with you.

At the moment, accepting customer payments with foreign bank information isn’t possible in QuickBooks Online. You may consider using a third-party application to obtain international credit cards.

You can visit the App Center or your Apps menu to check for this tool. QuickBooks offers several applications to help streamline your work. Just follow the outlined steps below:

1. Open your QuickBooks account.
2. Go to your Apps menu.
3. Enter a keyword on the Search field, then select the app.
4. You can click the Overview, Pricing, Reviews, and FAQs to view the details.
5. Select Get app now.

I’ve added this article in case you want to process a bank transfer (ACH) for your customer’s sales receipt or invoice in the future: Process an ACH bank transfer from a customer.

If there's anything else I can help you with, especially in managing your customers’ transactions, just let me know. I’ll be here. Have a great day and always take care!                                                                                                        

@john318 

What kind of business do you run? A service company?

You need a 3rd app and/or a 3rd party merchant service to integrate with your QBO and accept international credit card payments.