possible relinquishment
This would be a good link for individual study at home on the internet. A great lecture could be built around it, if one has internet access live in the classroom and a way to project it.
A method and system provides transactions and arrangements in virtual world environments. A user can participate in transactions to acquire virtual property and related virtual rights. In some implementations, real-world and virtual parties can be involved in virtual collateral transactions as well as conditional transfers and/or revocations involving various types of virtual objects and virtual rights. A possible relinquishment of designated aspects of the virtual collateral may result from unsatisfactory compliance with a real-world obligation or virtual world obligation that is secured by the virtual collateral.