Creating a case dedicated for every single invoice is the best way in order to registering installment sales or purchase invoices and organizing relevant payment activities. Therefore an invoice and all its relevant payments would be linked to a specified case to separate this series of linked activities from other daily financial transactions and give a view to the summary and balance.

That is possible for users of enterprise system to create one or more administrative activity inside each case and assign them to a specified unit such as "Accounting \ Demands" to act as notification tasks for following up the installment payment operations.

In this case, the assigned activities will inform users of the desired unit to fulfil the settlement process or change the date of the notification activity to the next calendar period and to the end.