Thanks for getting involved with this thread, Martin_Valve. I appreciate your detailed information.

I can certainly understand how an ability to turn off invoice reminders per customer/invoice could be useful and have submitted a suggestion about it as of today.

You can also submit your own feature requests while signed in.

Here's how:

1. Use the Gear icon, then go to Feedback.
2. Enter your suggestion(s) in the Have feedback? window.
3. If necessary, attach a file with your Camera icon.
4. Select Next.
   
   

Your feedback's definitely valuable to Intuit. It will be reviewed by our Product Development team and considered in future updates. You can stay up-to-date with the latest news about your product by reviewing Intuit's Product Updates webpage.

You also have the option of checking our QuickBooks App Store for apps which may be able to help you achieve what you're looking to do.

For the time being, you can use the steps shared in RCV's post to turn off automatic invoice reminders. If you decide to turn them off, they'll only be sent for invoices when you manually send them.

I've also included a detailed resource about working with invoices which may come in handy moving forward: Create & manage invoices

Please don't hesitate to send a reply if there's any additional questions. Have a lovely Thursday!