Is it possible to limit the payback period in RMA?
The RMA extension allows you to limit the return period after order completion. It can be defined in Backend » System » Configuration » aheadWorks Extensions » RMA » General tab. And here you can specify this period in days.
RMA for Magento 2 has a similar set of features which is growing with every release. Also, admin panel interface has been significantly improved to provide better user experience for every day tasks.