Thank you for posting, @lerato. 

You can send an email as payment reminders for unpaid invoices. 

Here’s how to do it:

1. Go to your Sales menu and then Invoices.
2. Look for that invoice and click the drop-down menu in the ACTIONS column then choose Send reminder.

See this article for more information: How to email or print an invoice.

Stay in touch if you have other concerns by leaving a comment below. I'm always glad to help in any way I can.​ Have a great rest of the day.

@lerato - have a look at https://naggingpanda.com. You can set custom invoice and quote reminders on Nagging Panda by integrating into your QuickBooks account.