Thanks for coming to the Community for help, @tobi2.
First and foremost, you need a QuickBooks Payments account to process credit cards in QuickBooks Online. Since you have a customer who's paying you with a credit card that has an address located outside the United States, they may have a ZIP code (or Province code) that includes characters that meets the U.S. 5 digit standard so that the pay now link will work.
If the customer zip code is compatible in the U.S. for processing payments, you can receive the payment of your customer in your account by following the steps below:
- From the Gear icon below the Customers column, select Receive Payment.
- Enter the Customer Payment Details.
- Make sure you select the Undeposited Funds account in the Deposit to menu. If you’ve already deposited the payments, then choose the account you deposited it to.
- Click Save and Close.
To confirm payment was applied to the right customer, select Customers on the left menu bar, then locate the invoice number and amount. Once you find it, the Status column should indicate PAID.
If their Zip-code doesn’t meet the U.S 5 digit standard, your customer should contact the card-issuing bank to determine if there are options for using their international card with U.S. based businesses that require a 5-digit numeric zip code. Intuit's payment processing doesn't utilize an alphanumeric zip code field.
There are two ways to process card payments with your payments account, for more details you can visit this article: Process a credit card payment in QuickBooks Online.
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