"Temporarily Unavailable" for customer invoice payment page

I noticed there is an ongoing issue. For the time being, utilize this 3rd party payment service as the alternate option to let your customer pay your invoice in due course.

https://melio.grsm.io/quickbooks

Same issue happening for our customers.

Thanks for sharing your experience with us, @adamDFKC and @pesaari.

Currently, there's an investigation where some customers are unable to pay their invoices online. Rest assured our engineering team is all hands to fix this as soon as possible. 

In the meantime, you'll want to delete and recreate the invoice and send it again to your customer. You can also let your customers pay you manually or via an ACH payment.

Also, I recommend getting in touch with our Support Team to be added to the list of affected users. This way, you'll be notified via email once this is resolved. Here's how to contact them.

In your QuickBooks Online (QBO) account:

1. Go to the (?) Help menu.
2. Click Contact Us.
3. Enter a brief discussion of your concern and click Let's talk.
4. Then choose Start messaging or Get a callback.

    

You might also want to check this article that provides detailed information on how to give your invoice a unique look: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Do get back to me if there's anything you need help with. I'm always around to assist you. Have a great day and more success in your business!