Hi, @Davecat1. Let me provide some insights about the message to customer option for your invoices.

The Message To Customer details still appear on your invoices. You'll find identical information reflected in the Body section once you send your transactions. I'm adding these screenshots as your visual reference.

If your invoices don't show these details or the messages get deleted, you can troubleshoot this by recording and sending your transactions through a private window to narrow down the result. You can save time by utilizing either of these keyboard shortcuts:

• Google Chrome: Press Ctrl+ Shift + N
• Safari: Press Command + Shift + N
• Mozilla Firefox: Press Ctrl+ Shift + P

If it works fine, revert to your regular browser, then clear its cache to refresh the page.

To gain more insights while working with your invoices, refer to the resources provided in this article: Create invoices in QuickBooks Online. The same material will show you how to receive customer payments in our system.

On the other hand, if you'd like to personalize more and include specific information in your sales forms, you can utilize this article as your reference: Customize invoices, estimates, and sales receipts in QuickBooks Online.

If you have any follow-up questions about your invoices or sales entries, please share them in the comment section below. I'm here and ready to assist you with just a few clicks. Have a great day!