Is there a way of creating an automated report listing open invoices that are a week or more overdue (or a week or more old - our invoices are all due on receipt)?

Hello Jonathaneshaw, 

In order to see any invoices that are open or overdue a week or more, you could look at the ageing detail report and can customise it to show 7 days per period then save the customisation and when your run the report it will only show what you have customised the report to show.