My customer's credit card payment is repeatedly declined when he attempts to pay from the invoice. What's wrong?

Thanks for reaching out to the Community, @dougrora.

I want to ensure this gets resolved for you. Let me redirect you to the right support so the customer's payment for the invoice can be processed.

I recommend contacting the QuickBooks Payments Support Team. They have the tools that can look at the transaction details and find out why the payment isn't getting processed.

Furthermore, here's a Community article that you may find useful: Process a credit card payment in QuickBooks Online.

Let me know how the conversation goes! I'll be here if you have additional questions or concerns. Have a great rest of your day!