Thanks for joining this discussion, jkube.
Naturally, you'll be receiving notification of the status of your payment from your QuickBooks Online dashboard.
If you're unable to see this message from your dashboard, go to Alert Center Manually. You can refer to this article for a detailed steps: The Alert Center from the QuickBooks Online Dashboard is not being displayed.
Let me know if you have other concerns or questions about customer payments in QBO. I'd be delighted to help you out.