Credit Notes - Credit Memos

OC can generate invoices but how about having ability to generate a credit note when a product is returned? At this moment, credit notes are done with another software.

Qphoric has a Store Credit System
http://theqdomain.com/ocstore/opencart_ ... torecredit

We also need a credit note system which would be nice to have within OC rather than separately. The refund system simply doesn't work for us as refunds are never fixed and is often based on compensation etc.

So, is there anything out there?