Posting in the Magento forums has been disabled pending the implementation of a new and improved forum solution which should better serve the community.
For new questions please post at magento.stackexchange.com, the community-run support site for the Magento community. We will be providing updates on the new forum solution soon. For questions or concerns please email email@example.com.
if you are still interested in the issue, you may take a look at this extension: http://amasty.com/magento-rma.html. It enables you easily handle refunds and item replacement and letseven guest visitors create RMA requests:
- Easy RMA request management
- All product types support
- Guest RMA option
- RMA requests per item
- Unlimited custom statuses