The Overdue invoices report is available from the Customers and Reports menus.
An invoice is considered overdue when the due date is anterior to the current date.
The due date is calculated based on the date of the document and the payment deadline.
The payment deadline follows any existing setting on the customer card.
If no payment deadline is set on the customer record, the deadline set on an invoice takes the default value of 30 days.
This default value can be changed under Settings > Configuration:
