Due date for Invoice generation

Hi,

I have a scenario that we need to raise a single invoice on a particular date for all previous shipments and I would like to automate this process. When the dye date comes it should send the notification alert for invoice genration or need to import the invoice from OM to AR automatically.

First thing i wanted to know, is there any option to capture the due date for invoice generation. It will change for every customer.

Thanks for your support in advance.

Regards

Siva