Hi there, Ellislm. When sending invoice reminders to your customers, ensure that the invoice is already saved and closed to ensure the reminder will be sent.
Also, verify that the recipient's email address is accurate to avoid delivery issues. Once confirmed, go to the Customers tab > locate the customer > click the dropdown arrow > select Send Reminder.
With that said, your customer will be notified about their unpaid invoices, and you may record the payment to keep your records balanced.
If you need anything else related to QuickBooks, don't hesitate to reply here. We're here to help.
