This feature allows you to create a list of templates configured to be sent via email or sms automatically upon payments being overdue. 

Within Settings > Payment Settings, you can configure the following: 

Turn on to configure: 

Select Configure reminders

Within this screen you can set a number of reminders. 

Select + Add late payment reminder 

Reminder Editor 

With the editor you have the following fields available: 

Units & Period type - The reminder is sent based on the number of (units and period) after the due payment date. 

For example, 1 week after due payment would look like this: 

Action - You can send as an Email or SMS

Edit Template - Use the template editor to build your template email or sms

Enabled - This will turn this reminder on, and every day will check any overdue payments and send the reminder out.