This app runs on top of CCE's Lisa Finance & ERP application.
In Lisa you can link purchase invoices to an approval flow. An approval flow gives you the option to block invoices for payment until the necessary responsible parties give their approval.

The application gives you an overview of the invoices that you can approve and reject.

There are 3 views for each invoice.
- view the scanned PDF
- view the registered details
- consult the history of the approval flow

You can approve or reject the invoice via 2 buttons. In the event of rejection, you must provide a reason for rejection with a description of the reason.