I have "invoice overdue notification" turned off in setting but invoice reminders are still being emailed

Welcome back to the Community, @networkcarpetcle.

Once the Auto Invoice Reminder option is turned off in QuickBooks Online (QBO), the system will automatically stop these reminders from being sent to your customers.

To check if the browser is already full of frequently accessed page resources, causing some unusual responses, try signing into your QBO using a private browser (incognito).

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

If everything looks good, go back to your default browser and perform a clear cache to refresh the system. However, if the issue persists, try using other supported browsers.

Just in case, I'll add this article for future reference: Automate invoice reminders in QuickBooks Online.

Please let me know if you have any other issues or concerns by leaving a comment in this thread. I'm always here to help. Enjoy the rest of the day!