Too easy!
You can define 4 different messages to send to your customers depending on the age of the invoices oustanding. If a customer has outstanding invoices in more than overdue age, it will take the message for the oldest age. The ages are:
- 7 – 13 Days overdue
- 14 – 29 Days overdue
- 30 – 59 Days overdue
- 60+ Days overdue
The categories work independant to the customer terms, so a customer on 7 day terms or 30 day terms will get the same message if their invoice is 7 – 13 days overdue for example.
Please see the Getting Started Manual
here
See Debtors Invoice Manager/Send Email Reminders.